Which of these statements about myelination in neurons is/are cor...

Question

Which of these statements about myelination in neurons is/are correct? Select True or False for each statement.
T/F It speeds propagation by increasing the density of voltage-gated channels all along the axon.
T/F Multiple sclerosis is characterized by disrupted myelination of certain neurons in the central nervous system.
T/F It speeds propagation by preventing cations from leaking out across the membrane as they spread down the axon.
T/F It is more commonly observed in vertebrates than in invertebrates.

Accepted Answer

Hello everyone and welcome to today's video. So today we need to identify the options which described the myelin sheath. One should recall from previous videos what these myelin sheath is and it's a structure found in the neurons. So let me quickly hope you remind this. This is an insulating layer that forms around these nerves or these neurons and they help the neurons transmit signals quicker and more efficiently. So this is the main function of these mayan sheets. Now let's go over answer choices so that we begin solving these problems beginning by answer choice B. It's an insulating coding on the accent of neurons. Well, this is actually a correct answer choice as we see here at the beginning of our explanation. So we're not going to cancel it out. Then we have Q. It results in solitary conduction. Well since the signals are being transmitted quicker and more efficiently this is going to result definitely insulted Torrey conduction. So we're not going to cancel this out either. Then we have answer choice or statement art. They are great neurons in the central nervous system. Remember that the myelin sheath, it's a structure or these insulated layer that forms around the accents. They're not neurons themselves. So we're going to cancel this out. Then we have that is a chemical messengers that help neurons communicate. They are not really messengers. They're really stuck on the neurons so they're not going to help the neurons communicate. They're just going to improve these transmission of the signal. So we're going to cancel this out as well. Then we have t decreases the speed of the nerve impulse. This nerve impulse is going to be the signal. Remember that it makes the signal go quicker and be transmitted more efficiently. So this is actually going to be a pulse statement as well, remembers that We're looking for the correct answer choices regarding the myelin sheath, which is going to be P. And Q. And this is represented by answer choice A. That is the end of the video, and I really hope this helped you.

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