A "nerve" is defined as ____.
A)neuron fibers bundled inside a sheath of connective tissue
B)a single axon of a neuron
C)a neuron within the central nervous system
D)a ring of neurons in bilaterally symmetrical animals
E)a fiber more than 10 inches in length

Question

Quizplus · Accepted Answer

A nerve is a bundle of neuron fibers (both axons and dendrites) that are surrounded by a sheath of connective tissue. This allows the nerve to transmit electrical signals quickly and efficiently. Choice B is incorrect because a nerve is made up of multiple axons, not just one. Choice C is incorrect because neurons within the central nervous system are not typically referred to as nerves. Choice D is incorrect because a ring of neurons is not a nerve, but rather a nerve net, which is found in organisms such as jellyfish. Choice E is incorrect because the length of a fiber does not determine whether or not it is a nerve.

A "Nerve" Is Defined as ____