Which best describes muscle action?

Question

Quizplus · Accepted Answer

Myosin and actin molecules use ATP in a catch-pull-release mechanism to contract the muscle fibers, as long as nerve stimuli prevent troponin from blocking the action. This process is known as muscle action or muscle contraction. Option A is incorrect as a reflex response involves a quick, automatic response to a particular stimulus, without the involvement of conscious thought. Option B is incorrect because while ATP is important for muscle contraction, it is not directly released by the nerve stimulus. Option C is incorrect because the release of acetylcholine causes a change in the electrical potential of the muscle cell, allowing the calcium to flow in and trigger the contraction.

Which Best Describes Muscle Action