What is the point of separation between adjacent sheathing cells?
Correct answer: C. Node of ranvier
- A. Ganglion
- B. Soma
- C. Node of ranvier
- D. Axon ending
Explanation
Nodes of Ranvier are gaps or interruptions in the myelin sheath that surrounds axons. They are located at regular intervals along myelinated axons and play a crucial role in the rapid conduction of nerve impulses by allowing the electrical signal to "jump" from one node to the next, a process known as saltatory conduction. Nodes of Ranvier are the points of separation between adjacent sheathing cells along a myelinated axon.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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