Relative to skeletal muscle, smooth muscle
A) only uses less energy to generate a given amount of force.
B) only can sustain contractile force without fatigue.
C) only uses calcium from the sarcoplasmic reticulum and extracellular space.
D) uses less energy to generate a given amount of force and can sustain contractile force without fatigue.
E) uses less energy to generate a given amount of force, can sustain contractile force without fatigue and uses calcium from the sarcoplasmic reticulum and extracellular space.

Question

Quizplus · Accepted Answer

Smooth muscle is more energy-efficient than skeletal muscle, allowing it to sustain contractions for longer periods without fatigue. Additionally, smooth muscle utilizes calcium ions from both the sarcoplasmic reticulum and the extracellular space to initiate and maintain contraction, unlike skeletal muscle which primarily relies on calcium from the sarcoplasmic reticulum.

Relative to Skeletal Muscle, Smooth Muscle