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Mars2501 [29]
3 years ago
5

Immediately following the arrival of the stimulus at the axon terminal of a motor neuron there is a short period called the ____

____ period during which the neurotransmitter is released by exocytosis, diffuses across the synaptic cleft, and binds to its receptors.
Biology
1 answer:
trapecia [35]3 years ago
4 0

Answer:

latent

Explanation:

A single action potential from a motor neuron triggers a single contraction in the muscle fibers of its motor unit. There is a brief delay between the application of the stimulus and the beginning of contraction. This delay is termed the latent period.

As the stimulus arrives axon terminal of a motor neuron, the resultant muscle action potential is propagated over the sarcolemma as the neurotransmitter is released in the synaptic cleft and binds to its receptors. There is a release of calcium ions from the sarcoplasmic reticulum to trigger excitation. During the latent period, muscles do not contract. The contraction period occurs once the latent period is over.

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A single ________ on the ________ chromosome plays a crucial role in the prenatal development of the testes.
Tju [1.3M]

Answer:

A single gene on the Y chromosome plays a crucial role in the parental development of the testes.

Explanation:

Y chromosome is present only in males and this chromosomes is the distinguishing factor which separates males from females. It is the smallest chromosome but of utmost importance due to its sex determining feature. Up till now, studies show that Y chromosomes only carry limited amount of genes.  

The Y chromosome, most importantly, comprises of the SRY gene. This is the gene responsible for determining the testis and for the development of the testis. The SRY gene is responsible for sex determination.

6 0
3 years ago
What are the layers of the Sun, starting from the center and moving outward?
olga55 [171]

Answer:

C. photosphere, convective zone, radiative zone, and core

7 0
2 years ago
Read 2 more answers
QUESTION 1
Paladinen [302]

Answer:

1. RNA

2. Cytosine and guanine

3. RNA

4. Replication

5. Unwinding the double helix

6. DNA polymerase

7. Identical

8. Repair the DNA

9. Changes in nucleotides of a DNA molecule that affect the genetic message

10. The gene for beta-galactosidase turns off.

11. p53

12. A part of DNA that does not code for a functional protein

13. Proteins

14. Transfer RNA

15. The making of an RNA molecule from a DNA strand by pairing of bases of RNA nucleotides with the complementary bases in DNA

16. 3

17. Tertiary

18. Enzymes

19. The reaction slows down.

20. The active site of an enzyme

21. 60%

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I hope that this helps you !

5 0
3 years ago
A) Write down three letters that show arteries.
sergeinik [125]

Answer:

you have to include a picture

8 0
3 years ago
If a swimmer cuts his foot on a seashell while wading in the ocean and bleeds into the seawater, his erythrocytes will shrink. W
Tom [10]

Answer:A) The ocean is hypertonic to the erythrocytes.

Explanation:cells shrink when placed in an hypertonic solution.

This shrinkage occurs does to the movement of water out of the cell and through the cell membrane.this phenomenon is called plasmolysis.

The movement of water out of this cell occurs through osmosis.osmosis is the movement of water from a region of high concentration of solute to a region of low concentration of solute, through a semi-permeable membrane.

In this case,sea water has a higher concentration of solute (hypertonic) and the blood cells has a lower concentration(hypotonic) .the cell membrane serves as the semi-permeable membrane and and a result water moves out of the cell

6 0
3 years ago
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