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liq [111]
3 years ago
14

When two excitatory postsynaptic potentials (EPSPs) occur at a single synapse so rapidly in succession that the postsynaptic neu

ron's membrane potential has not returned to the resting potential before the second EPSP arrives, the EPSPs add together, producing
A. spatial summation
B. temporal summation
C. tetanus
D. the refractory state
Biology
1 answer:
Aliun [14]3 years ago
6 0

Answer:

temporal summation

Explanation:

Temporal summation occurs when stimuli are applied to the same axon in rapid succession. These back to back stimuli cause overlapping EPSPs that sum. Temporal summation requires the buildup of neurotransmitter released by a single presynaptic end bulb two or more times in rapid succession that does not allow the postsynaptic neuron's membrane potential to return to the resting potential. The resultant postsynaptic potentials sum. A typical EPSP lasts about 15 msec. Therefore, temporal summation occurs when the second release of neurotransmitters occurs soon after the first one so that the postsynaptic neuron does not acquire resting potential.

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Whats the difference from photo synthesis and cellular respiration
Kobotan [32]

Answer: Photosynthesis makes the glucose that is used in cellular respiration to make ATP. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. It is the released oxygen that is used by us and most other organisms for cellular respiration.

5 0
3 years ago
biết gen A quy định hat vàng trội hoàn toàn so với gen a quy định hạt xanh nằm trên NST thường . cho cây vàng tự thu phấn , kiểu
goldfiish [28.3K]

Answer:

YY là kiểu gen trội đồng hợp tử (2 alen Y). Kiểu hình của kiểu gen này có màu hạt vàng. Yy là kiểu gen dị hợp tử (một alen trội, một alen lặn). Kiểu hình của kiểu gen này có màu hạt vàng.

Explanation:

6 0
2 years ago
You have a population in hardy-weinberg equilibrium for the m and n alleles. These alleles are codominant. The allele frequency
pishuonlain [190]

You have a population in hardy-Weinberg equilibrium for the m and n alleles. These alleles are codominant.  Allele frequency of m is 0. 4. 0.48 is the frequency of heterozygotes in the population.

An allele frequency has been computed by dividing the total quantity of copies of each of the alleles at that specific genetic location in the population by the number of points of time the allele of interest has been observed in a population.

The frequency of each genotype is typically calculated by dividing the population's total count of individuals by the number of people who have that genotype.

To learn more about hardy-Weinberg equilibrium,

brainly.com/question/14665912

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3 0
1 year ago
A plant reaches its adult stage when _____. it begins photosynthesis it is fertilized it is ready to reproduce the plant parts b
Papessa [141]

A plant reaches its adult stage when it is ready to reproduce.

 

The statement “All plants reproduce several times before dying” is true. The answer is letter A. Plants can reproduce several times as long as it has the gametes needed for reproduction.

4 0
3 years ago
When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferenc
Komok [63]

Answer:

c

Explanation:

Random distribution of the Isopods should be 50/50 in A and B.

Chi-square = \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency

Chamber         O                    E             Chi-square

  A                   18                   10             \frac{(18 - 10)^2}{10} = 6.4

  B                    2                    10             \frac{(2 - 10)^2}{10} = 6.4

<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8

<em>Degree of freedom</em> = 2 - 1 = 1

<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415

The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.

<em>The correct option is </em><em>c</em><em>.</em>

4 0
3 years ago
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