Asked by Stephanie Yvarra on Sep 23, 2024
Verified
Which of the following is NOT true of tonus?
A) It is a state of slight muscle contraction.
B) It occurs when a muscle is fully contracted.
C) During periods of tonus, the motor units take turns contracting.
D) It keeps the motor units healthy and ready to contract at any time.
E) All of these are true of tonus.
Tonus
The state of partial contraction or tension of muscles at rest, maintaining posture and readiness for action.
Motor Units
The functional units of the neuromuscular system, consisting of a motor neuron and all the muscle fibers it innervates, responsible for muscle contraction.
- Comprehend the mechanism and significance of tonus in muscles.
Verified Answer
DS
David Schenk3 days ago
Final Answer :
B
Explanation :
Tonus is a state of slight muscle contraction, but it does not occur when a muscle is fully contracted. The other options listed are true of tonus.
Learning Objectives
- Comprehend the mechanism and significance of tonus in muscles.
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