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Multiple Choice
Which part of the neuron is referred to as the axon?
A
The long, slender projection that conducts electrical impulses away from the cell body
B
The insulating layer surrounding some nerve fibers
C
The branched extensions that receive signals from other neurons
D
The central region containing the nucleus
Verified step by step guidance
1
Understand the structure of a neuron: A neuron consists of three main parts—dendrites, the cell body (soma), and the axon. Each part has a specific function in transmitting signals.
Identify the axon: The axon is the long, slender projection of the neuron that conducts electrical impulses away from the cell body (soma). It is responsible for transmitting signals to other neurons, muscles, or glands.
Differentiate the axon from other parts: Dendrites are branched extensions that receive signals from other neurons, while the cell body contains the nucleus and integrates incoming signals. The axon is distinct because it carries signals away from the cell body.
Consider the insulating layer: Some axons are surrounded by a myelin sheath, an insulating layer that increases the speed of electrical signal transmission. This sheath is not the axon itself but a feature of certain axons.
Match the description to the correct answer: Based on the explanation, the axon is described as 'The long, slender projection that conducts electrical impulses away from the cell body.'