Which of the following would likely have the highest proportion of slow-twitch fibers?
A) Muscles of the arm
B) Muscle controlling elevation of the eyelid
C) Postural muscles of the neck and spine
D) Muscles in the fingers
E) Muscles of the shoulder

Question

Quizplus · Accepted Answer

Postural muscles of the neck and spine are responsible for maintaining posture and stability, which requires endurance and sustained contraction. These muscles primarily consist of slow-twitch fibers, which have a high capacity for aerobic respiration and fatigue resistance.

Which of the Following Would Likely Have the Highest Proportion