The nodes of Ranvier are
A)vesicles of neurotransmitters, stored in presynaptic neurons.
B)little knobs attached by small necks to the surface of dendrites.
C)vesicles of calcium ions, stored in postsynaptic neurons.
D)points along axons that are not surrounded by myelin.

Question

Quizplus · Accepted Answer

The nodes of Ranvier are gaps or points along the axon of a neuron that are not covered by myelin. They are important for the conduction of electrical impulses along the axon. Options A and B are incorrect because they refer to structures that are not related to the nodes of Ranvier. Option C is also incorrect because calcium ions are not stored in postsynaptic neurons, but rather play a role in the process of neurotransmitter release at synapses.

The Nodes of Ranvier Are