How does myelination of axons in the brain regulate the timing of postsynaptic activations?

1 answer:

3 0

The myelination of axons or the presence of the myelin sheath regulates the conduction velocity of the nerve impulses by acting as an insulator to the nerve fibers. The spaces or gaps between each myelin sheath are called the nodes of Ranvier and the impulse go from one node to another. This phenomenon is called saltatory conduction.

Nice to know: The myelin sheath in the central nervous system is provided by cells called oligodendrocytes. On the other hand, the myelin sheath in the peripheral nervous system is provided by cells called the Schwann cells.

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A protein that acts as a hormone is _____. 1. collagen 2.methionine 3. pepsin 4. insulin

galben [10]

Answer:

The correct answer is 4. insulin

Explanation:

Proteins are made up of amino acids which are joined together by peptide bond. Insulin is a peptide hormone which is made amino acids therefore it is also a protein. An insulin molecule is made up of 51 amino acid residues and 5808 Da is its molecular weight.

The insulin hormone is released by the beta cell of the pancreas. It is released when the level of glucose in the blood increased from the normal blood glucose level.

It helps in conversion of glucose into glycogen and its storage in muscles and liver. So by doing this, it decrease the level of glucose in the blood. Therefore the right answer is 4.

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The type of passive transport that involves the movement of water across a semipermeable membrane from a region of high water co

FinnZ [79.3K]

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4 years ago

An oncogene is: Select one:

Anna007 [38]

Answer:

I think it is A. I'm only guessing because I have never heard of an Oncogene before.

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3 years ago

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What is the most important thing that needs to happen during the process of mitosis?

andreev551 [17]

The key to mitosis occurring is the presence of a nucleus.