Question

whether or not a motor unit activates upon the arrival of an impulse depends on the principle
question 55
each muscle fiber is activated through impulses delivered via its motor end - plate
true
false
question 56
the capacity to activate muscle fibers simultaneously is known as

Explanation:

1. Whether or not a motor unit activates upon the arrival of an impulse depends on the all - or - none principle. In this principle, a motor unit will either fire completely in response to a sufficient stimulus or not at all.
2. Each muscle fiber is activated through impulses delivered via its motor end plate. This is a fundamental concept in muscle physiology where the neuromuscular junction allows for neural control of muscle contraction. So the statement is True.
3. The capacity to activate muscle fibers simultaneously is known as motor unit recruitment. It is an important mechanism for controlling the force of muscle contraction.

Answer:

1. all - or - none
2. True
3. motor unit recruitment