During an action potential, the rapid decrease in sodium permeability and simultaneous increase in potassium permeability is responsible for Repolarization.
K+ departs the cell after Na+, which enters the cell first. Ions can move freely across the axon membrane because of the difference during the action potential.Because sodium contains a positive charge, the neuron becomes more positive and depolarized. Potassium channels take longer to open. As soon as the cell does open, K+ rushes out, reversing the depolarization known as repolarization.Sodium channels close during the peak of the action potential when potassium leaves the cell. When potassium ions are effluxed, the membrane potential is lowered or the cell becomes hyperpolarized.Outside of the cell, the concentration of Na+ is greater than inside the cell. while the concentration of K+ is is greater inside the cell than outside.
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1. Define Isogamous with example.
2. Define Anisogamous with example.
3. Define Oogamous with example.
Answer:
1. Having two similar gametes in which no differentiation can be distinguished, or reproducing by the union of such gametes.
e.g. in Spirogyra and Ulothrix
2. Anisogamy refers to a type of sexual reproduction in which two dissimilar gametes unite or fuse. The gametes may differ in size or form.
Example : human beings, the male gamete sperm is smaller and motile while the female gamete egg is non motile and larger.
3. having or involving a small motile male gamete and a large immotile female gamete.
E.g. Volvox, Fucus
Which compound refer to those that are produced by plants or animals?
Natural compounds
Synthetic compounds
Biotechnology
None of the above
natural compounds I mean all organic compounds
Explanation:
many organic compounds are obtained directly from the plants and animal sources by suitable method of installation a few filling here example are carbohydrate cellulose sugar and starches for prediction of hunters of useful organic substances such as solved synthetic rubber explosive and plastic
Which membranous structures conduct impulses through the sarcoplasm to stimulate the release of calcium?.
Answer:T-tubules
Explanation
The action potential invades T-tubules and causes the L-type calcium channels to open, which in turn causes ryanodine receptors (RyRs) in the SR to open and release calcium, which stimulates contraction.
(a) Explain why red blood cells burst when placed in some solutions of sodium chloride.
Answer: Red blood cells placed in a solution with higher water concentration compared to their contents will gain water by osmosis that will then swell up and then burst.
Explanation:
Osmosis causes red blood cells to release water when they are exposed to sodium chloride solutions that are more concentrated than their internal environment (hypertonic solutions).
Hemolysis is the term for this process. In an attempt to balance the solute concentration, water is pulled out of the cells by the high concentration of sodium chloride outside the cells, creating an osmotic gradient. The result is that the cells shrink and may eventually rupture or burst. Lack of water reduces internal pressure and destabilizes cell membranes, causing red blood cells to burst.
This phenomenon underscores how important it is to maintain the correct balance of solute concentrations to protect the structural and functional integrity of red blood cells.
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What happens during a claustrophobic attack?
It can trigger symptoms of anxiety ranging from mild sweating or trembling to fainting or a panic attack.
It can trigger symptoms of anxiety ranging from mild sweating or trembling to fainting or a panic attack.Common claustrophobia triggers include small rooms, elevators, closets, MRI scanners, airplanes, and other small or tight spaces.
Which of these is a negative form of a plant tropism?
Answer:
Gravitropism is a common example which can be used to describe negative tropism.
Gravitropism is an example.
When a plant grows upwards and is defying gravity.
Therefore, it is negative gravitropism.
How does sucrose move from source to sieve?
The sucrose move in source to sieve by active transport.
What is active transport?Active transport is a type of transport in which the cell expends energy to move solutes against their concentration gradients. The sodium-potassium pump is an example of active transport. Active transport differs from passive transport in that the cell does not expend energy.
In this case, the sucrose moves from companion cells into source to sieve elements by active transport. This reduces the water potential of the source to sieve element by osmosis, which increases the hydrostatic pressure.
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How is research from college/ universities doing to help stop coronavirus or stop the spread?
Answer:
I added an answer I am afraid it was wrong and I am new I don't know how to delete an answer, so I just edited and wrote this
Explanation:
Answer: i do not know
if this is correct
Explanation:
1. Conducting research
2. Sharing data and information
3. Boosting medical personnel
4. Putting idle facilities to good use
5. Offering ethical guidance
Dihybrid crosses In humans, rolling tongue is dominant over non-rolling and curved thumbs are dominant over straight thumbs. do a cross between: heterozygous roller/heterozygous curved and homozygous non-roller/homozygous straight. describe the phenotypes as fractions?
Answer:
Heterozygous roller/heterozygous curved, heterozygous roller/homozygous straight, homozygous non-roller/heterozygous curved, homozygous non-roller/homozygous straight
Explanation:
Grouping of objects help the shopkeeper, justify the statement.
Which of the following is considered a sustainable use of a common?
Fishing regulation
Grazing on public land
Plastics in oceans
Water pollution
Answer:
Explanation:
air polution
Why do we see each moon phase
only about once a month?
Choose 1 answer:
A
It takes about 27 days for the
moon to rotate on its axis once.
B
It takes about 27 days for the
moon to orbit Earth once.
It takes about 27 days for the
moon to orbit the sun once.
Answer:
A
it takes about 27 days for moon to rotate on its axis
A biology class is studying the concept of carrying capacity. On a field trip, the
students measure a pond and estimate its surface area to be 240 m². Previous
research shows that each frog in a pond requires about 2 m² of pond space to
survive. How many frogs can this pond support?
A. 120
B. 121
C. 480
D. 484
1.write the chemical equation for transpiration
2.what is translocation ??,give the chemical equation for translocation
plss help will mark brainlest..
Transpiration is a water balance process mediated by stomata opening. Translocation is the transport process of photosynthetic substances from leaves to other tissues.
What is transpiration?Transpiration is a water balance process.
Through stomata opening and closure (which depends on how hydrated the plant is) water vapor is expelled from the leaves.
If the plant is dehydrated, stomata close. If it is not dehydrated, it opens.By limiting water exit, stomata allow more water molecules to be available for light reaction processes when the plant is dehydrated.
The equation to calculate transpiration is as follows,
E = Gv (Cvs - Cva)
Where,
E is transpiration.Gv is the total vapor water conductance.Cvs is the water concentration inside the leave.Cva is the air water concentration.What is translocation?Translocation is a fast and dynamic process through which photosynthetic products are transported from the leaves to other tissues of the plant to be used or stored.
This transport is done by the phloem cells through active transport or osmosis (depending on the substance).
The translocation of elements from the leaves to the roots is fast.
In conclusion,
The chemical equation for transpiration is E = Gv (Cvs - Cva). Translocation is the movement of photosynthetic products from leaves to other plant tissues.You can learn more about translocation and transpiration at
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The area around the Sahara Desert is slowly changing into a dry region, similar to the desert. Which trait is most likely to be selected in the population of plants growing in this region?
A.
trait encoding for short plant structure to reduce transport of water
B.
trait encoding for thick bark on trees
C.
trait encoding for increased leaf size to increase photosynthesis
D.
trait encoding for fruit
The trait that is most likely to be selected in the population of plants growing in this region is trait encoding for short plant structure to reduce transport of water.
How are desert plants adapted?Adaptation is any change that is made or undergone to suit a condition or environment.
Desert plants are adapted to the dry condition of the area by the possession of several traits.
According to this question, the area around the Sahara Desert is slowly changing into a dry region, similar to the desert.
This suggests that the trait that is most likely to be selected in the population of plants growing in this region is trait encoding for short plant structure to reduce transport of water.
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Answer:trait encoding for short plant structure to reduce transport of water
Explanation:The Sahara Desert is a zone which receives very low or no precipitation. This region receives maximum of sunlight not received by any other biome. The soil is typically sand which is highly porous and lacks essential growth nutrients necessary for plant growth. The plants grown around Sahara Desert are xerophytic plants. These plants undergoes several adaptations in order to prevent loss of water through transpiration. Trait encoding for short plant structure to reduce transport of water is a xerophytic adaptation.
Which scientists atomic model is more recent
The more recent atomic model is known as the “electron cloud” model.
What is the “electron cloud” model?The “electron cloud” model is a theory used in physics to explain the position and relative arrangement of atomic elements.
According to this model (electron cloud), negatively charged electrons for clods around atomic nucleus.
In conclusion, The more recent atomic model is known as the “electron cloud” model.
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Which is transported in the xylem of a plant?
A. Dead material
B. Water
C. Chloroplast
D. Blastocysts
Answer:
water
Explanation:
water and other dissolve material are transported in the xylem of a plant
All cells have ribosomes.
However, some cells have more
ribosomes than others.
the
Which cells have the MOST
ribosomes?
A. Cells that produce proteins.
B. Cells that produce energy.
C. Cells that are involved in reproduction.
Answer:
B
Explanation:
Ribosomes main purpose is to make proteins from the process called translation. This is the second step in the process.
There are economic concerns surrounding the products that have been genetically engineered for
particular traits, including pharmaceutical products, crops, and enzymes used in manufacturing
processes. What are the proposed economic concerns that affect society? Check all that apply.
Prices for genetically engineered products are raised as a result of patents on products.
Farmers must spend more money to obtain genetically engineered seeds for desired crops.
Consumers must spend more money to purchase genetically engineered products.
More land is utilized for genetically engineered crops than for organic crops.
RETRY
The genetically engineered foods are those foods that are produced by the process of genetic engineering (options B&C)
What are genetically engineered foods?The genetically engineered foods are those foods that are produced by the process of genetic engineering. They are specifically designed for various purposes.
The economic concerns that affect society regarding the genetically engineered foods are;
Farmers must spend more money to obtain genetically engineered seeds for desired crops.Consumers must spend more money to purchase genetically engineered products.Learn more about genetically engineered foods:https://brainly.com/question/12649370
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a woman going through menopause may take ________ to minimize the symptoms.
A woman going through menopause may take estrogen as part of hormone replacement therapy.
What is menopause?Menopause is the period in a woman's life in which she stops menstruation. This is because the woman's ovaries stops producing eggs and the level of the hormone estrogen is reduced.
To minimizethe symptoms associated with onset of menopause, a woman going through menopause may take estrogen as part of hormone replacement therapy.
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How could we build a microscope with a higher resolution?
The way that we could build a microscope with a higher resolution is; as detailed below
How to create a better Microscope?To achieve the higher resolution in a microscope system, each of the optical components must be of the highest Numerical aperture available.
Another way to achieve a higher resolution is by using a shorter wavelength of light to view the specimen which will increase the resolution.
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Haploid and diploid are terms that represent the ______ of an organism.
Haploid and diploid are terms that represent the sets of the chromosome of an organism.
What do you mean by chromosomes?The thread-like components known as chromosomes are found in the nucleus of both animal and plant cells. Protein and a single molecule of deoxyribonucleic acid make up each chromosome (DNA).
When an organism's cells only have one set of chromosomes, the organism is said to be a haploid. All organisms that reproduce sexually are diploid (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.
The number of chromosomes found inside a cell's nucleus is known as the diploid chromosomal number. The symbol for this number is 2n. Each organism has a different one. In contrast to sex cells, somatic cells are diploid.
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What are the products of Anaerobic Respiration in yeast?
The products of anaerobic respiration in yeast are carbon dioxide and ethanol.
Anaerobic respirationThis refers to respiration in the absence of oxygen.
In the absence of oxygen, both the citric acid cycle and the electron transport chain cannot proceed. Thus, only glycolysis takes place.
The two pyruvate molecules produced in anaerobic respiration in yeast are converted to ethanol, instead.
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The initial period of population growth for a species in an environment is _______. a. linear b. exponential c. slow d. negative Please select the best answer from the choices provided A B C D
Answer:
b
Explanation:
Initial period of population growth is most likely to be exponential and then slowly reach a point of "equilibrium" where the population is stable. Meaning the death and the birth are balancing it out.
Answer:
b. exponential
Explanation:
apa template about multiple sclerosis
Answer:
Multiple Sclerosis is an inflammatory disease in which myelin sheath of nerve cells of brain and spinal cord are damaged.
Explanation:
Cause:- (Exact cause of inflammation is not known)
But damage is caused due to attack by autoimmune cells or antibodies against myelin sheath.Types of tissues attack:-
Oligodendrocytes and myelin sheath is damaged and stripped away from axon and the process is known as demyelination.Myelin sheaths are made up of fatty tissues and help in transmission of electric impulse.Result of immune system attack:-
Damaged myelin sheath stop forming whIte matter of central nervous system.Hence disrupt coordinating communication between different brain regions.Signs and symptoms:- vary from person to person
Diminished eyesight.Disrupt motor coordination.Weak sensory perception.Fatigue and dizziness.Speech disorder.Muscle weakness and spasticity.Difficulty in urination and stool.Diagnosis and treatment:-
Diagnosis include MRI T2 findings and cerebrospinal fluid specific oligoclonal bands.#SPJ2
Perspective influences how a person looks at a piece of art and its qualities.
a.
always true
c.
always false
b.
sometimes true
d.
Perspective is not relevant in the interpretation of art.
Please select the best answer from the choices provided
A
B
C
D
Answer:
D.
Explanation:
d.
Perspective is not relevant in the interpretation of art.
A permanent change in the DNA sequence of a gene
Answer:
A mutation.
Explanation: When a cell mutates is will be permanently changed.
A titmouse and a chickadee are living in the same territory and are using some of the same resources. the best way to classify this interaction is as:
The best way to classify an interaction between titmouse and a chickadee living in the same territory and using some of the same resources is competition.
What is competition?Competition is an interaction between living organisms or species in which both require a resource that is scarce in supply.
According to this question, a titmouse and a chickadee are living in the same territory and are using some of the same resources.
This suggests that the interaction between titmouse and a chickadee living in the same territory and using some of the same resources is competition.
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Which of the following correctly describes the relationship between thermal energy and
temperature?
Select one:
O a. Temperature is a measure of thermal energy
O b. Temperature and thermal energy are the same thing
Both conductors and insulators transfer thermal energy, but not electrical energy.
One of them does not transfer energy.
O d. Both conductors and insulators transfer electrical energy, but not thermal energy.
reviewing Meiosis:
1. Draw a diagram depicting the process if crossing over.
Answer:
I attached a diagram I found online. This one is a bit more general. If you want me to include the PMAT part of meiosis, then just ask.
