Question Detail

ZOO 101 ZOO 101 Past Questions Objective Question
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Question

What is a motor unit composed of?
Options
A A sarcomere and a Z-line
B One actin and one myosin filament
C A motor neuron and all the muscle fibers it innervates
Correct Answer
D A single muscle fiber and its myofibrils
Correct Answer

Option C is the correct answer.

Detailed Explanation

A motor unit consists of a single motor neuron and all the skeletal muscle fibers it branches to innervate. Activation of the neuron contracts all fibers in that unit.

Hint

Smaller units allow fine control (eyes); larger units provide power (thighs).

Question Info

Course: ZOO 101
Topic: ZOO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 84 of 2214
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