Which of the following is NOT true of tonus?

A. It is a state of slight muscle contraction.
B. During periods of tonus, the motor units take turns contracting.
C. It occurs when a muscle is fully contracted.
D. It keeps the motor units healthy and ready to contract at any time.
E. All of these are true of tonus.


Answer: C

Anatomy & Physiology

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Using the figure below, identify the labeled part.



1 Label M: ______________________________
2 Label N: ______________________________
3 Label O: ______________________________
4 Label P: ______________________________
5 Label Q: ______________________________
6 Label R: ______________________________
7 Label S: ______________________________
8 Label T: ______________________________
9 Label U: ______________________________
10 Label V: ______________________________
11 Label W: ______________________________

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Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology