An example of a partial but sustained contraction is
A)knee jerking.
B)muscle tone.
C)a twitch.
D)eye blinking.

Question

Quizplus · Accepted Answer

Muscle tone refers to the partial contraction of a muscle that is sustained over time. It is necessary for maintaining posture and is controlled by the nervous system. Knee jerking, twitches, and eye blinking are examples of brief and involuntary muscle contractions, but not sustained contractions.

An Example of a Partial but Sustained Contraction Is