Fill in the blanks: The myelinated segment of an axon that is covered by a glial cell is called a/an_______ ; the gaps between glial cells where _____the axolemma is exposed are called          .

Video transcript

Hey, everyone. Let's take a look at this question together. The presence of this structure allows myelinated neurons to conduct nerve impulses more rapidly and efficiently than the unmyelinated neurons. Is it answer choice? A, the nodes of Ranvier answer choice B the nucleus, answer choice C the axon terminal or answer choice D the soma let's work this problem out together to try to figure out which of the following answer choices is the name for the structure that allows the myelinated neurons to conduct nerve impulses more rapidly and efficiently than the unmyelinated neurons. So, in order to solve this question, we have to recall what structure is found within the myelinated neurons that would allow them to conduct nerve impulses more rapidly and efficiently than the unmyelinated neurons. And we can recall that in relation to the myelinated neurons, we know that in myelinated neurons, the myelin sheath is what covers the axon. And it has periodic gaps also known as nodes of which those periodic gaps or nodes that are present in the myelinated neuron and not in the unmyelinated neuron allows for that in of the speed and efficiency of the nerve impulse conduction. So the nodes or the periodic gaps that are found only in the myelinated neurons allows them to conduct nerve impulses more rapidly and efficiently than the unmyelinated neurons. And the name for those periodic gaps or nodes is answer choice. A, the nodes of Ron Va which is the correct answer and all other answer choices are incorrect. Since answer choice, BC and D all contain structures that are not related to the myelinated neurons conducting their nerve impulses more rapidly and efficiently than the unmyelinated neurons. So answer choice A is the only correct answer choice. I hope you found this video to be helpful. Thank you and goodbye.