Points on the axon where myelin sheath is not present is called:
Correct answer: A. Nodes of Ranvier
- A. Nodes of Ranvier
- B. Schwann cells
- C. Neuroglia
- D. Dendron
Explanation
Nodes of Ranvier are the short gaps between adjacent Schwann cells where the axon is not covered by myelin, and the impulse jumps from node to node in saltatory conduction. Schwann cells form the myelin itself, and neuroglia is the general name for supporting cells of the nervous system.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
Practise Coordination and Control
1,700 free Coordination and Control MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Neurons and Nerve Impulse questions
In unstimulated stage, a neuron has a membrane potential of:
Which of the following neurotransmitters works outside the brain?
In which part of the neuron, Nissl's granules are present?
Structurally ganglia are clusters of:
What unique characteristic is typically found in sensory neurons of spinal nerves?