Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated spatial summation.
A strategy for generating an action potential in a neuron using input from several presynaptic cells is called spatial summation. It is the algebraic addition of potentials from various input regions, typically dendrites.This process, known as spatial summation, occurs when inputs from several neurons combine to cause an action potential. These potentials, which are often from dendrites, are combined to produce the spatial summation.The likelihood that a potential will reach the threshold level required to trigger an action potential increases with the amount of excitatory postsynaptic potentials. Similar to this, the likelihood of attaining the threshold potential to trigger an action potential decreases as the number of inhibitory postsynaptic potentials increases.
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Why are there 64 combinations of genetic codons for only 20 different amino acids?
Answer:
Because they all don't code for specific amino acids
Explanation:
Some of them don't code for Amino acids, instead, they code for directions. There are also amino acids that can be coded with multiple codons. this is why there are more codons than amino acids
suggest why a plant cell in 0.10 mol dm salt solution will not burst
Answer:
So, the correct answer is 'Cells wall is rigid and does not get overstretched'
What effect will a heterotropic activator have on a sigmoidal kinetic plot of V versus [S]?
An effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] is a shift to the left by the curve.
What is an enzyme?An enzyme refers to a biological catalyst that speeds up the rate of a chemical reaction, especially by lowering the activation energy of its chemical reactants.
In Science, a heterotropic activator is a regulatory molecule which serves as an activator of the enzyme. Thus, an effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] would be a shift to the left by the curve.
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Bone cells that become surrounded by bone matrix and are located in cavities called lacunae are:.
Answer:
Osteocytes
Explanation:
i studied this
Imagine an instance where there are two parents, and both have polydactyly, a trait which is determined in this example by a singel gene. They have four children, one of hwom have polydactyly. what is the probailty their next child witll have polydactyly
The probability that their next child will have polydactyly is 0.75
What is Polydactyly?Polydactyly may be characterized as a circumstance in which an individual has more fingers or toes as compared to normal.
In humans, it occurs due to the homozygous mutants for a HOXD13, and due to which digits are joined and a condition known as Polysyndactyly occurs.
If both parents carry the genotype heterozygous for Polydactyly, i.e. Pp, the resultant offspring will have the genotypes PP, Pp, Pp, and pp. In which pp is normal, while all the three are affected due to the expression of dominant allele causing Polydactyly.
Now, according to the question, only one of the offspring possess the genotype of pp, hence the probability of their next child will have polydactyly is [tex]\frac{3}{4}[/tex] = 0.75.
Therefore, the probability that their next child will have polydactyly is 0.75.
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Why do some codons code for the same
amino acid as another codon?
A. It is due to mutations.
B. There are only 20 amino acids and 64 possible
combinations.
C. Each codon is unique and they all code for different
amino acids.
volume and pressure inside the left ventricle at the end of diastole is referred to as:
The volume and pressure inside the left ventricle at the end of diastole is referred to as end-diastolic volume and end-diastolic pressure respectively.
What is a diastole?A diastole is the part of the heartbeat cycle when the heart muscle relaxes and allows the heart chambers to fill with blood.
The volume inside the left ventricle at the end of diastole is referred to as end-diastolic volume.
The pressure inside the left ventricle at the end of diastole is referred to as end-diastolic pressure.
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Axial skeleton (how many bones and what?)
Axial skeleton is composed of 80 bones in the body system.
What is Axial skeleton?
These are bones which are found in the central core of the body and examples include skull, vertebrae etc.
The axial skeleton comprises of 80 bones which perform various types of functions in the body.
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which type of cells are spherical and contain energy molecules?
The type of cells that are spherical and contain energy molecules are fat cells
What is a fat cell?A fat cell is a connective cell in the body that is spherical in shape that is use to store and produce energy, fatty acids and help to store fat. Fat cells are a form of connective tissues in the body that generate ATP and also store fat in adipose tissue.
Therefore, The type of cells that are spherical and contain energy molecules are fat cells
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Which bronchus is about 5cm long and slightly narrower and more horizontal than the one on the opposite side?.
Answer:
Explanation:
left main bronchus
What is it that makes diseases caused by viruses and bacteria hard to treat?
Answer:Why are diseases caused by viruses often difficult to treat?
Explanation
Viruses are much harder to treat since they are within the human host cells. Most antiviral medications slow down the virus but do not kill it. Antivirals keep the infection under control, or stop the virus from multiplying, while your immune system does the heavy lifting.
Answer:
Antimicrobial resistance all of a sudden happens when germs and fungi develop and then it gives the ability to kill the drugs designed to kill them hundred times smaller then human cells
Explanation:hope that helps have a great day and stay safe (;..... p:s this is ashely/cee cee
list down the food items that are generally spoiled by the presence of bacteria
Answer:
The most common food item that is spoilt by bacteria is dairy products,canned food,fish meat etc.
based on sex assigned at birth, women tend to reach higher bac levels more quickly than men because:
Women tend to reach higher bac levels more quickly than men because they have lower levels of the enzyme alcohol dehydrogenase.
What is BAC levels?BAC levels refers to the blood alcohol levels.
Women tend to reach higher BAC levels than men.
The enzyme alcohol dehydrogenase is responsible for the metabolism of alcohol.
Women generally have lower levels of the enzyme in their body and thus metabolize alcohol more slowly.
Thus, women reach higher BAC levels than men.
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What blood vessel is found in the anterior-medial thigh?
The blood vessel that is found in the anterior-medial thigh is the femoral artery.
What is the femoral artery?The femoral artery is a major blood vessel that transports blood from the abdomen to the lower limbs.
The femoral artery is fundamental because it transports high volumes of oxygen-rich blood.
In conclusion, the blood vessel that is found in the anterior-medial thigh is the femoral artery.
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Which thermoregulation strategy helped the hummingbird decrease its body
temperature?
a. flying
b. eating
c. basking in the sun
d. resting in the shade
submit
The thermoregulation strategy helped the hummingbird decrease its body
temperature is resting in the shade. Thus, option "D" is correct.
What is Thermoregulation?Thermoregulation itself is actually a branch of homeostasis. Homeostasis is defined as the internal regulation of body environment which includes the vital organs of the body such as the heart, liver, brain and contraction of skeletal muscles.
Thus, option "D" is correct.
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Black eyes are dominant to orange eyes, and green skin is dominant to white skin. A male MendAlien with black eyes and green skin, has a parent with orange eyes and white skin. A female MendAlien with orange eyes and white skin. If these male and female MendAliens were to mate, the predicted phenotypic ratio of their offspring would be _____.
The phenotypic ratio of their offspring would be 1/4 each for black eyes/green skin, black eyes/white skin, orange eyes/green skin, and orange eyes/white skin respectively.
Dihybrid crossingThe male would be heterozygous since he has a parent that is homzygous recessive.
Assuming that eye color is A/a and skin color is B/b.
The genotype of the male would be: AaBb
The genotype of the female would be: aabb
AaBb x aabb
Progeny
A_B_ = Black eyes, green skin = 1/4
aaB_ = orange eyes, green skin = 1/4
A_abb = black eyes, white skin = 1/4
aabb = 1orange eyes, white skin = /4
See the attached image for the Punnet's square analysis.
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which term describes an
enzyme?
Answer:
A biological catalyst
Explanation:
An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.
How is the law of conservation of mass applied to ecology?
Answer:
The laws of conservation of mass applies to ecology because the transfer of nutrients from organisms to the ground results in excess energy not disappearing
Answer: The law of conservation of mass states that the total amount of mass remains constant in a system. In ecology, this means that when an organism is eaten, its mass is conserved. Some of the organism’s mass is used to make new proteins, and some of it is passed as waste in the form of urine or feces. The rest is converted directly into energy. This energy helps the consumer to move and grow, and it helps it to build and repair new tissue.
Explanation: The written response for you guys
what does the sympathetic and parasympathetic do ?
The sympathetic and parasympathetic are responsible for the body's spontaneous actions, such as breathing, heartbeat, digestion, body temperature control.
What is the function of the sympathetic and parasympathetic nervous systems?The sympathetic nervous system acts in an opposite way to the parasympathetic one, preparing the organism to react in situations of fear, stress and excitement, adapting the functioning of several internal systems to a high state of readiness.
In this case, the Sympathetic nervous system also controls body functions that are rarely conscious and parasympathetic nervous system the part of the autonomic nervous system responsible for stimulating actions that allow the body to respond to calm.
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ASAPPPP EASYYYY ILL MARK BRAINLY
Select all direct effects increasing UVR have on animals?
is
a) reduces immunity to diseases
a direct effect increasing UVR have on animals
a. reduces immunity to diseases
The effect increasing UVR has on animals is reducing immunity to diseases.
What is UVR?A body could be heated to an incandescent temperature to generate UV radiation, which seems to be the case with solar UV, or an electric current would be sent through a gas, typically vaporized mercury, to generate UV radiation.
What are diseases?A disease would be a specific aberrant state that adversely affects an organism's structure as well as function on the whole or in part, and which could be not immediately brought on by any external trauma.
Therefore, the correct answer will be an option (a)
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Which trait is most likely to be selected in the population of plants growing in this region of the desert?
The ability to limit water transport and to conserve it is the feature most likely to be chosen in the plants growing in the desert.
Since the plants in desert regions are tiny, have deep roots, and have a thick, which also helps to keep the plants cool and slows evaporation, they lose less water and are more effective in hot temperatures like deserts. Animals cannot consume the majority of desert plants because they have. As a result of cactus and aloe vera flourishing in this area of the desert, The flora is frequently seen in deserts.
So The ability to limit water transport and to conserve it is the feature most likely to be chosen in the plants growing in the desert
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How do humans differ from chimpanzees?
Humans and chimpanzees are both mammals but they have characteristics that different or set them apart from each other. These characteristics include;
- Chimpanzees work on all four legs while humans walk on only two legs
- Chimpanzees avoid river/oceans because they do not know how to swim while humans can learn how to swim with constant practices
- The body of a chimpanzee is covered with thick hairs while humans do not have as much hair on the body
- Humans have an S shaped spine while chimpanzees have a C shaped spine
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Why is scientific knowledge more reliable than other types of knowledge?
A. Because false hypotheses are discarded, and results are peer reviewed by other experts to ensure accuracy.
B. Science is not more reliable.
C. Because science only uses facts that are proven 100% true through the use of variables.
D. Because scientists are more reliable than other people.
Answer:
C
Explanation:
Everything around us is all about science...We practice them everyday...All thanks to the scientists after so much examines,they let us know more about many things we don't know much about,they worked on them and improve them so that we can live a convenient life.
why do cell biologists study yeast?
Biologists study cells due to the cell relation to that of animal cell
What are yeasts?Yeast are eukaryotic organisms which are part of the fungus kingdom.
They are important to biologist because they tend too carry out all the functions of the eukaryotic cells and they are known to be closely related to animals
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How many of Earth's spheres does
the carbon cycle move through?
A. one
B. a few of the Earth's spheres
C. impossible to know
D. all of the Earth's spheres
The carbon cycle moves through virtually all of the earth's spheres.
Carbon cycle
There are 4 majors spheres of the earth:
AtmosphereGeosphere or LithosphereBiosphereHydrosphereThe carbon cycle moves through the air (atmosphere), oceans (hydrosphere), organisms (biosphere), and the soil (geosphere).
Thus, the carbon cycle moves through all the spheres of the earth.
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Answer: D. all of the Earth's spheres
Explanation:
Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in
Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in the amount of genetic variation in a population.
What is natural selection?Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. Because of this variety, some people have characteristics that suit their surroundings more than others.
Four requirements must be met for natural selection to take place: reproduction, inheritance, variety in physical traits, and variation in the number of children produced by each person.
Reproduction:
A population must procreate to produce a new generation in order for natural selection to affect it. Over many generations, people who have the characteristics that are most compatible with their environment tend to breed more than people who don't.
Heredity:
Since the genes of the parents combine to form the DNA of their offspring, heredity and reproduction go hand in hand. Natural selection must operate if parents with favourable qualities pass those traits on to their kids.
Variation in Characteristics:
Only when individuals within a community differ in their personal features can natural selection take place. For instance, different people must have varied colors in order to research natural selection on color within a population. There wouldn't be any traits for nature to "select" over others in the absence of variety in traits.
Fitness Variation:
Compared to its popular notion, fitness has a more technical meaning. Fitness in the context of evolution refers to an organism's capacity for maximum survival and reproduction. Natural selection cannot take place in a population unless its individuals have varying levels of fitness. Some people must have characteristics that make it easier for them to survive and procreate more frequently than others. Otherwise, natural selection cannot act to increase the number of people with advantageous features and decrease the number of people with undesirable qualities.
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In the process of _________________________________ one sperm fertilizes the egg, and the other fuses with 2 gametophyte nuclei to form the first endosperm cell. This process occurs in gymnosperms and angiosperms.
Answer: in the process of polyspermy development
Explanation: in most cases the egg cell blocks polyspermy
What telescope would be used to find a black hole?
Select one:
a.
Chandra
b.
Spitzer
c.
Compton Gamma Ray Observatory
d.
James Webb
the chandra telescope can be used to see blackholes
Chandra telescope would be used to find a black hole. Therefore, option (A) is correct.
The Chandra X-ray Observatory is a space telescope that was developed with the express purpose of detecting and researching X-ray emissions coming from various astronomical bodies. Observing the powerful X-ray radiation released from the neighbourhood of black holes, particularly their accretion discs and jets, has been an essential part of the process that led to the discovery of black holes and the investigation of their properties.
Because of the important new information it has uncovered about the characteristics and actions of black holes, Chandra has become an essential instrument in this field of study.
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Which statement provides an environmental reason to use renewable paper bags instead of nonrenewable plastic bags?
Answer:
it's not easy to destroy plastics if we use nonrenewable plastics u will have to throw them and they will become poison to the insets
Drag the tiles to the correct boxes to complete the pairs.
Match the factors affecting genetic diversity with the examples.
m. All rights reserved.
habitat fragmentation
pollution
exploitation
sewage from cities dumped into vers
sections of large forests cut down for resources
Burmese pythons Infesting the Everglades
rhinos Indiscriminately killed for their horns
▶ O GE
invasive species
101
N
Factors that affect genetic diversity are:
sewage from cities dumped in vers - pollutionsections of large forests cut by resources - habitat fragmentationBurmese pythons infesting the Everglades - invasive speciesrhinos indiscriminately killed by their horns - explorationWhat is genetic diversity of an example?
The diversity of alleles of individuals of the same species is what we call genetic variability.
Haireyeskin colorheight and voice,for example, are characteristics present in human beings that make us quickly understand that we have phenotypic variations in relation to others.
With this information, we can conclude that Factors that affect genetic diversity are: sewage from cities dumped in vers - pollution, sections of large forests cut by resources - habitat fragmentation, Burmese pythons infesting the Everglades - invasive species, rhinos indiscriminately killed by their horns - exploration
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