A neuron is composed of _______ major parts.
three
— Concept: This question tests your basic understanding of the structural components of a neuron, the fundamental unit of…Concept: This question tests your basic understanding of the structural components of a neuron, the fundamental unit of the nervous system.
Why (C) is correct: A typical neuron is composed of three major parts: the cell body (soma), dendrites, and the axon. The cell body contains the nucleus and other organelles. Dendrites are short, branched processes that receive signals. The axon is a long process that transmits signals away from the cell body.
Why other options are wrong:
- (A) four: Neurons do not typically have four major parts.
- (B) two: While sometimes simplified to cell body and processes, the processes are distinct (dendrites and axon).
- (D) five: Neurons do not typically have five major parts.
NEET Tip: Remember the three main structural components and their primary functions: Dendrites (receive), Cell body (integrate), Axon (transmit).
Correct Answer: (C)
three