MEWDS (Multiple evanescent white dot syndrome) is a rare, self-limited, acute inflammatory disorder that affects the retina, the layer of tissue at the back of the eye that detects light and sends visual information to the brain.
MEWDS is typically characterized by sudden onset of blurred vision, scotoma (blind spot), and a collection of small white dots scattered throughout the retina. These dots are believed to represent small areas of inflammation and damage to the retinal cells. MEWDS predominantly affects young women and usually resolves on its own within a few weeks to months.
The exact cause of MEWDS is unknown, but it is thought to be an immune-mediated reaction triggered by a viral or bacterial infection or vaccination. Diagnosis is typically made through a comprehensive eye exam and imaging tests such as optical coherence tomography (OCT) or fluorescein angiography.
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Question is incomplete. complete question is:
What is MEWDS (Multiple evanescent white dot syndrome)?
A woman has a blood type of A+. Her daughter is O+, and her son is B negative. Rh positive is a simple dominant over Rh negative. Assuming the two children have the same father, and he is Rh negative, what is his blood type?
B+
AB+
AB-
B-
The father's blood type is B-. The mother must have the genotype AO (since she has blood type A) and is Rh positive, which means she could pass either the A or O allele to her children. The daughter has blood type O+, indicating that she received the O allele from both parents and is Rh positive.
This means that the father must have the genotype oo (since he is Rh negative) and could only pass on the O allele to both children.
The son has blood type B- and must have received the B allele from his father, as the mother does not have the B allele. Therefore, the father must have the genotype Bo. Since Rh positive is a simple dominant over Rh negative, it means that the father must have also passed on the Rh negative allele to his son.
Therefore, the father's blood type is B-.
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one method for cloning organisms is nuclear transplantation. what happens in this process?
In nuclear transplantation, the nucleus of a donor cell is transferred into an enucleated egg cell to create a cloned organism.
Nuclear transplantation involves the following steps:
1. A donor cell is obtained, typically a somatic cell from the organism to be cloned.
2. The egg cell from a female organism is enucleated, meaning its nucleus is removed.
3. The nucleus from the donor cell is inserted into the enucleated egg cell.
4. The reconstructed egg cell is stimulated, usually with an electric current or chemical, to begin cell division.
5. The resulting embryo is implanted into a surrogate mother to develop and give birth to the cloned organism.
Nuclear transplantation is a method for cloning organisms by transferring the nucleus from a donor cell into an enucleated egg cell, resulting in the creation of a cloned organism with the same genetic material as the donor.
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5. (a) what is the shift in methodology (and thinking) that is required for synthetic polymer sustainability? (b) briefly describe the three different methods for 3d bioprinting of tissues? (c) why is digital image correlation a more accurate way to measure strain than an extensometer?
The shift in methodology and thinking required for synthetic polymer sustainability involves transitioning from a linear "take-make-dispose" model to a circular economy approach.
This involves designing polymers for recyclability, using renewable resources, minimizing waste generation, and adopting environmentally friendly production processes. The three different methods for 3D bioprinting of tissues are:
1. Inkjet-based bioprinting: This method involves depositing bioink droplets onto a substrate using inkjet printer-like technology. The droplets contain living cells suspended in a biomaterial, allowing precise layer-by-layer construction of tissue structures.
2. Extrusion-based bioprinting: In this approach, bioink is extruded through a nozzle in a controlled manner, layer by layer, to create tissue structures. It typically utilizes hydrogel-based bioinks with embedded cells.
3. Laser-based bioprinting: Laser-based bioprinting utilizes a laser to precisely position cells and biomaterials. The laser creates a pressure wave that pushes the cells into the desired location, enabling the creation of complex tissue structures with high cell viability.
(c) Digital image correlation is a more accurate way to measure strain than an extensometer because it provides full-field strain measurements. While an extensometer measures strain at a single point, digital image correlation analyzes changes in digital images captured before and after deformation to determine strain across the entire surface. This allows for the detection of localized strain variations and a more comprehensive understanding of material behavior under load. Additionally, digital image correlation can capture non-uniform strains, deformation patterns, and strain concentrations, which may be missed by a single-point extensometer.
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anatomy and physiology are difficult to separate because
Anatomy and physiology are difficult to separate because they are interdependent and closely related fields of study.
Anatomy and physiology are difficult to separate because they are inherently connected. Anatomy is the study of the structure and organization of living organisms, while physiology is the study of the functions and processes of those organisms. The two disciplines are intertwined because an organism's structure directly affects its function. In order to fully understand an organism's physiology, it is necessary to have a thorough understanding of its anatomy. Conversely, an understanding of an organism's physiology can help to explain its anatomy. Therefore, it is challenging to fully separate the study of anatomy from the study of physiology.
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in addition to atp synthase, protons are able to pass through ucp1 channels as well. this results in the production of heat. what tissue type is characterized by a high expression of ucp1
The tissue type that is characterized by a high expression of UCP1 is brown adipose tissue.
The tissue type characterized by a high expression of UCP1 is brown adipose tissue (BAT). Unlike white adipose tissue (WAT), which stores energy in the form of triglycerides, BAT is specialized for heat generation and contains many mitochondria and UCP1 proteins.
UCP1 uncouples oxidative phosphorylation from ATP synthesis, allowing the energy from electron transport to be released as heat instead. This process is also known as non-shivering thermogenesis and is an important mechanism for maintaining body temperature in newborns and in mammals that hibernate. UCP1 expression can also be induced in WAT under certain conditions, such as exposure to cold temperatures or certain hormones.
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having wet earwax is a dominant trait. if one parent is homozygous dominant for the trait and the other is heterozygous, what is the probability that their offspring will have dry earwax? (tip: create a punnett square)
Answer:
0%
Explanation:
homozygous dominant WW heterozygous Ww
in the fick's equation below, if the membrane of a capillary becomes thickened while all other variables are constant, how would the rate of diffusion of o2 from the capillary to a tissue cell be influenced? r
A thicker membrane would negatively impact the rate of diffusion of O2 from the capillary to a tissue cell, making it harder for the cell to receive the necessary oxygen for metabolic processes.
Fick's equation describes the rate of diffusion of a substance across a membrane, such as from a capillary to a tissue cell. The equation is given as:
J = -D(dC/dx)
where J is the flux of the substance, D is the diffusion coefficient, and dC/dx is the concentration gradient across the membrane.
If the membrane of a capillary becomes thickened while all other variables remain constant, the rate of diffusion of O2 from the capillary to a tissue cell would be reduced. This is because the diffusion coefficient, D, would be decreased due to the thicker membrane. A thicker membrane would create more resistance to the movement of O2 molecules, leading to a decrease in the overall rate of diffusion.
Additionally, the concentration gradient across the membrane (dC/dx) may also be affected. A thicker membrane may lead to a smaller concentration gradient, as there would be less of a difference in O2 concentration between the capillary and tissue cell.
Overall, a thicker membrane would negatively impact the rate of diffusion of O2 from the capillary to a tissue cell, making it harder for the cell to receive the necessary oxygen for metabolic processes.
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what type of slice would you make in order to separate the dorsal and ventral areas of the brain
To separate the dorsal and ventral areas of the brain, you would make a transverse slice.
A transverse slice, also known as a horizontal slice, is made perpendicular to the longitudinal axis of the brain, dividing it into dorsal (top) and ventral (bottom) regions. To separate the dorsal and ventral areas of the brain, you would make a horizontal (axial) slice. This type of slice divides the brain into superior (dorsal) and inferior (ventral) sections, allowing for the examination and separation of these distinct areas.
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using the energy from light, what is the initial electron donor in photosynthesis?
Using the energy from light, the initial electron donor in photosynthesis is water. This process is called photolysis or light-dependent reactions.
In photosynthesis, light energy is absorbed by chlorophyll molecules and is used to split water molecules into oxygen and hydrogen ions. This process is called photolysis or light-dependent reactions. The oxygen is released into the atmosphere while the hydrogen ions are used to power the creation of ATP (adenosine triphosphate), a molecule that provides energy for the plant's cells.
The electrons from the hydrogen atoms are then transferred to a molecule called NADP+ (nicotinamide adenine dinucleotide phosphate) which becomes reduced to NADPH. This molecule is used in the next stage of photosynthesis called the Calvin cycle or light-independent reactions. Therefore, the initial electron donor in photosynthesis is water.
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Which of the following cells is the first cell of a new organism?
egg cell
sperm cell
zygote
during which phase does development of the structure that exchanges nutrients between the mother and the offspring begin? click on your answer in the concept map.
The development of the structure that exchanges nutrients between the mother and the offspring begins during the embryonic phase of pregnancy. This phase starts from the moment of fertilization and lasts until the end of the eighth week of pregnancy.
During this phase, the embryo undergoes rapid cell division and differentiation to form the basic structures of the body, including the placenta. The placenta is an organ that develops within the uterus and connects the mother's blood supply with that of the developing fetus. It acts as a filter, allowing oxygen and nutrients to pass from the mother to the fetus while removing waste products from the fetal blood.
The placenta also produces hormones that help to maintain the pregnancy and prepare the mother's body for birth. Thus, the embryonic phase is a crucial time for the development of the placenta and the establishment of the nutrient exchange system between the mother and the offspring.
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"How will the pieces of tape behave as I move the canisters closer together?" the teacher asked. What is your response?
As the canisters are moved closer together, the pieces of tape on them will experience an increasing attraction force between them.
This force is known as the adhesive force and is the force that causes the tape to stick to the surface of the canister. As the distance between the canisters decreases, the adhesive force between the pieces of tape will increase, making it more difficult to separate them. This is because the adhesive force is directly proportional to the surface area of contact between the tape and the canister. Thus, as the canisters are moved closer together, the surface area of contact between the tape and the canisters increases, resulting in a stronger adhesive force. However, there may be a limit to how close the canisters can be moved before the adhesive force becomes too strong and causes the tape to tear or deform. The exact behavior of the tape will depend on a variety of factors, including the type of tape, the surface of the canisters, and the strength of the adhesive force.
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In the human physiology lab, the spirometer was used to measure ...
Select one:
a. Muscle function
b. Grip strength
c. Lung function
d. Heart rate
Lung function.In human physiology lab, the spirometer is a common instrument used to measure lung function.
It is a device that measures the volume of air that moves in and out of the lungs during breathing. By measuring different aspects of lung function such as tidal volume, vital capacity, forced expiratory volume, and peak expiratory flow rate, the spirometer can provide important diagnostic information about respiratory diseases like asthma, chronic obstructive pulmonary disease (COPD), and pulmonary fibrosis. The spirometer is also used to assess lung function before and after medical interventions, such as bronchodilators or corticosteroids, to determine their effectiveness.
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the correct sequencing of the sections of the main body of a journal article would be
The sequencing of sections in the main body of a journal article can vary depending on the specific journal's guidelines and the field of study.
However, there is a general structure that is commonly followed in scientific articles. Here is a typical sequencing of sections in the main body:
Introduction: This section provides background information on the research topic, explains the significance of the study, and states the research objectives or hypotheses.Literature Review: In this section, the relevant previous research and studies related to the topic are reviewed and summarized. The literature review helps to establish the context for the current study and identifies the existing gaps in knowledge that the research aims to address.Methods: The methods section describes the research design, the participants or subjects involved, the materials or apparatus used, and the procedures followed. This section should provide sufficient detail to allow other researchers to replicate the study.Results: The results section presents the findings of the study. It typically includes numerical data, statistical analyses, tables, figures, or graphs. The results should be organized in a logical and clear manner, and any statistical significance should be reported.Discussion: In the discussion section, the results are interpreted and compared to previous research. The authors explain the implications and significance of the findings, address any limitations or weaknesses of the study, and suggest directions for future research. This section allows the authors to analyze and contextualize their results and contribute to the broader understanding of the topic.Conclusion: The conclusion section provides a concise summary of the main findings and their implications. It should restate the research objectives or hypotheses and discuss how the results align with or contribute to existing knowledge. Recommendations or practical applications may also be included in this section.References: The references section lists all the sources cited in the article using a specified citation style (e.g., APA, MLA, etc.). It is important to accurately and consistently cite the relevant literature to support the study's claims and to give credit to the original authors.Know more about journal article here
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the portion of the kidney in direct contact with the renal capsule is the ____________ .
The portion of the kidney in direct contact with the renal capsule is the Bowman's capsule.
Bowman's capsule is a cup-shaped structure that surrounds the glomerulus, which is a tuft of capillaries. The Bowman's capsule and the glomerulus together form a nephron, which is the functional unit of the kidney.
The Bowman's capsule is made up of two layers of epithelial cells: the visceral layer and the parietal layer. The visceral layer is in direct contact with the glomerulus, and it allows for the filtration of blood into the nephron.
The parietal layer is in contact with the renal capsule, and it helps to maintain the shape of the Bowman's capsule.
The Bowman's capsule is a very important structure in the kidney. It allows for the filtration of blood, which is the first step in the production of urine.
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clonus that may be seen when testing deep tendon reflexes is characterized by a(n):
Clonus that may be seen when testing deep tendon reflexes is characterized by a oscillating muscle contraction and relaxation
Clonus is a neurological sign that can be seen when testing deep tendon reflexes. It is characterized by a rhythmic, oscillating muscle contraction and relaxation that occurs after a sustained stretch of the muscle. This is often seen in the ankle or knee when testing the corresponding reflexes. The clonic movements may be sustained for several seconds or longer and can be a sign of an upper motor neuron lesion.
Clonus is often associated with spasticity and hyperreflexia, which are also signs of upper motor neuron dysfunction. It is important to note that clonus is not a normal finding and should be further evaluated by a healthcare provider.
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In which structures does maturation and storage of sperm occur?
a. vas deferens
b. testis
c. prostate
d. epididymis
e. seminal vesicles
Maturation and storage of sperm occur primarily in the epididymis, which is a coiled tube located on the back of each testicle. The epididymis serves as a site for sperm maturation, where they gain the ability to swim and fertilize an egg.
It also provides a storage location for mature sperm until they are ejaculated during sexual activity.
The other structures mentioned play different roles in the reproductive system but are not directly involved in the maturation and storage of sperm:
a. Vas deferens: It is a muscular tube that transports sperm from the epididymis to the ejaculatory ducts.
b. Testis: The testes are the primary reproductive organs responsible for sperm production.
c. Prostate: The prostate gland produces and secretes a fluid that is part of semen, but it does not directly contribute to the maturation or storage of sperm.
e. Seminal vesicles: These glands secrete a fluid that provides nourishment and energy for sperm, but they are not directly involved in maturation or storage.
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A marine biologist observes dolphins and records that they are engaging in playful behavior when in groups. Why is this an example of a qualitative observation?
Answer:
Qualitative descriptions use words to describe things. For example, "the car is white" and "the plastic is soft" are qualitative descriptions. Quantitative descriptions use numbers to describe things.
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Explanation:
Match up the internal cell structure with the function most closely associated with that structure:
a. nucleolus; production of cytoplasm b. ribosomes; production of DNA
c. lipid bilayer; production of ribosomes d. nucleolus; production of ribosomes
e. mRNA; production of cytoplasm
The correct matching of internal cell structure with the function most closely associated with that structure is:
a. nucleolus; production of ribosomes
b. ribosomes; production of proteins
c. lipid bilayer; regulation of molecules entering and leaving the cell
d. nucleolus; production of ribosomes
e. mRNA; synthesis of proteins by ribosomes
The nucleolus is responsible for producing ribosomes, which are necessary for the synthesis of proteins.
Ribosomes themselves are responsible for the production of proteins. The lipid bilayer, which forms the cell membrane, regulates the passage of molecules in and out of the cell.
The nucleolus is also responsible for the production of ribosomes. Finally, mRNA (messenger RNA) carries the genetic information from DNA to the ribosomes, where it is used to synthesize proteins.
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it takes the liver up to _____ hour(s) to metabolize one standard alcoholic drink.
It takes the liver approximately one hour to metabolize one standard alcoholic drink.
This is an approximate rate and can vary based on factors such as the individual's size, gender, and liver function, as well as the amount and type of alcohol consumed. Additionally, consuming alcohol faster than the liver can metabolize it can result in a buildup of alcohol in the bloodstream and an increased risk of harm, including alcohol poisoning. It is important for individuals to drink responsibly and in moderation to avoid negative health outcomes.
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which of the following could best account for the change in genotypic frequencies over the ten generations? responses because the a allele is unstable, over the course of the study most of the a alleles mutated to become a alleles. because the uppercase a allele is unstable, over the course of the study most of the uppercase a alleles mutated to become lowercase a alleles. the population is in hardy-weinberg equilibrium, which allows for changes in genotypic frequencies every generation.
The most likely explanation for the change in genotype frequencies over the ten generations is that the population is not in Hardy-Weinberg equilibrium.
In Hardy-Weinberg equilibrium, genotypic frequencies should remain constant unless acted upon by external forces such as mutation, selection, migration, or genetic drift. Therefore, if the population were in Hardy-Weinberg equilibrium, changes in genotypic frequencies would not be expected to occur every generation.
However, since the question offers two options related to allele instability and mutation, it is possible that a mutation occurred in the population that caused a change in the frequency of one of the alleles. If the uppercase "A" allele were indeed unstable, it could have mutated to become the lowercase "a" allele. Alternatively, if the lowercase "a" allele were unstable, it could have mutated to become the uppercase "A" allele. In either case, this would result in a change in genotypic frequencies over time.
Overall, it is important to note that the exact cause of the change in genotypic frequencies cannot be determined without further information about the study and the population being studied. However, the most likely explanation is that the population is not in Hardy-Weinberg equilibrium, which allows for changes in genotypic frequencies every generation.
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Which structure is responsible for formation of the regeneration tube following injury to an axon?
A. endoneurium
B. myelin droplets
C. Schwann cells
D. neurofilaments
The structure that is responsible for the formation of the regeneration tube following an injury to an axon is Schwann cells.
Schwann cells are glial cells that wrap around axons in the peripheral nervous system (PNS) and play a crucial role in nerve regeneration.
After an injury to an axon, Schwann cells in the immediate vicinity of the injury site undergo dedifferentiation, losing their myelin sheaths and reverting to an immature state.
These cells then proliferate and migrate to form a tube-like structure known as the regeneration tube, which guides the regenerating axon to its target tissue.
The regeneration tube provides a supportive environment for the regenerating axon, secreting growth factors and extracellular matrix molecules that promote axonal growth and prevent scar formation.
Over time, the Schwann cells within the regeneration tube differentiate and remyelinate the regenerating axon, restoring its normal function.
While endoneurium, myelin droplets, and neurofilaments all play important roles in nerve structure and function, they are not directly involved in the formation of the regeneration tube following injury to an axon.
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how to beat level 20 on brain test
justify the statement “with the development of technology, there has been growing human control over nature”?
Answer:
The statement “With the development of technology, there has been growing human control over nature” is justified as humans have been trying to take control over anything and everything.
Explanation:
The statement “with the development of technology, there has been growing human control over nature” describes the growing hunger of the human race to encompass all the things they can which they do with the help of the always developing technology that they make cities out of a flourishing forest, take animals out of their homes and put them in cages for their entertainment
The development of technology is essential but it does not provide justification for controlling nature that humans have forced over nature as no matter how much development is required there always needs to be a harmonious relationship between humans and nature to fully flourish and controlling the other cant be a good thing for anyone.
several things happen to inhaled air in a process called conditioning. select the exception.
Inhaled air undergoes several conditioning processes, including filtration, humidification, and warming to prepare it for gas exchange in the lungs. There is no exception to these processes.
Inhaled air undergoes several conditioning processes as it passes through the respiratory system to prepare it for efficient gas exchange in the lungs. These processes include filtration, humidification, and warming. Filtration helps to remove particles and potential pathogens from the air. Humidification adds moisture to the air, preventing the delicate lung tissues from drying out. Warming brings the temperature of the air closer to that of the body, making it easier for the lungs to process the air. There is no exception to these conditioning processes, as they are all essential to ensuring proper lung function and overall health.
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describe the adiabatic process and explain how it is responsible for causing clouds to form
The adiabatic process is a thermodynamic concept where a gas undergoes changes in temperature and pressure without any heat exchange with the environment. During this process, the gas either expands and cools (adiabatic cooling) or compresses and heats up (adiabatic heating) solely due to changes in pressure.
Cloud formation is a result of adiabatic cooling. When moist air rises in the atmosphere, it experiences a decrease in pressure, causing it to expand and cool. As the temperature drops, the air's capacity to hold water vapor decreases, leading to the condensation of water vapor into tiny water droplets or ice crystals, which form clouds. This is known as the condensation process.
In summary, the adiabatic process is responsible for cloud formation as it involves the cooling of rising moist air due to pressure changes, leading to condensation and the eventual formation of clouds.
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Total lung capacity (TLC) is equal to residual volume plus __________.
Select one:
a. expiratory reserve volume
b. tidal volume
c. vital capacity d. atmospheric pressure
e. inspiratory reserve volume
Vital capacity is the correct answer.Total lung capacity (TLC) is the maximum amount of air that the lungs can hold after taking in the deepest breath possible.
It is equal to the sum of all lung volumes, including the residual volume (the amount of air left in the lungs after maximal exhalation) and the vital capacity (the maximum amount of air that can be exhaled after a maximal inhalation). So, the formula for TLC is TLC = RV + VC, where RV is the residual volume and VC is the vital capacity.The lungs are a pair of organs in the chest that play a vital role in the respiratory system. Their primary function is to exchange oxygen and carbon dioxide between the air we breathe and the blood in our circulatory system. When we inhale, air enters our lungs and oxygen diffuses into the blood, while carbon dioxide diffuses out of the blood and into the lungs. When we exhale, the carbon dioxide-rich air is expelled from the lungs.The lungs are made up of tiny air sacs called alveoli, which are surrounded by blood vessels. This arrangement allows for efficient gas exchange between the air and the blood. The lungs also produce surfactant, a substance that helps to keep the alveoli from collapsing during exhalation.
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which cells of the small intestine secrete enterogastrones, such as secretin and cholecystokinin?
The cells that secrete enterogastrones, including secretin and cholecystokinin, in the small intestine are called enteroendocrine cells.
These cells are scattered throughout the lining of the small intestine, from the duodenum to the ileum. When certain types of nutrients, particularly fats and proteins, enter the small intestine, enteroendocrine cells release enterogastrones that help regulate digestion and nutrient absorption.
Secretin, for example, stimulates the pancreas to release bicarbonate ions to neutralize stomach acid, while cholecystokinin stimulates the gallbladder to release bile and the pancreas to release digestive enzymes. Overall, the release of enterogastrones by enteroendocrine cells plays a crucial role in maintaining the balance of digestive processes and ensuring that nutrients are properly absorbed and utilized by the body.
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assuming the system gets 3 atp per nadh and 2 per fadh2, how many atp molecules are produced (ignore any consumption) from glycolysis? (starting at glucose and ending at acetyl-coa?)
Assuming the system gets 3 ATP per NADH and 2 ATP per FADH2, the total number of ATP molecules produced from glycolysis (starting at glucose and ending at acetyl-CoA) is 2 ATP molecules.
During glycolysis, glucose is converted into pyruvate, which produces 2 NADH molecules. These 2 NADH molecules can then enter the electron transport chain and produce a total of 6 ATP molecules (3 ATP per NADH), resulting in a net gain of 2 ATP molecules. However, it's important to note that this calculation only includes the ATP produced from glycolysis and does not take into account any other metabolic pathways or consumption of ATP.
The system gets 3 ATP per NADH and 2 per FADH2, the ATP molecules produced from glycolysis (starting at glucose and ending at acetyl-CoA) can be calculated as follows: In glycolysis, 2 NADH and 4 ATP molecules are produced per glucose molecule. Since each NADH generates 3 ATP, the total ATP from NADH is 2 * 3 = 6 ATP. Considering the 4 ATP molecules produced directly during glycolysis, the overall ATP production is 6 + 4 = 10 ATP. However, it's important to note that 2 ATP molecules are consumed in the initial steps of glycolysis. Therefore, the net ATP production from glycolysis is 10 - 2 = 8 ATP.
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rods are found primarily in ______, whereas cones are found primarily in ______.
Rods are found primarily in the peripheral retina, whereas cones are found primarily in the fovea centralis, which is a small area at the center of the macula in the retina.
Rods and cones are types of photoreceptor cells in the retina of the eye that are responsible for detecting light and allowing us to see. Rods are more sensitive to light and are responsible for our ability to see in dim light conditions, while cones are responsible for our color vision and visual acuity. Rods are found primarily in the peripheral retina, which is the outer area of the retina, while cones are found primarily in the fovea centralis, which is a small area at the center of the macula in the retina, where visual acuity is highest.
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