CVS Practice Test

Question: 1 / 400

Is ATP necessary for both muscle contraction and relaxation?

Yes

ATP is indeed essential for both muscle contraction and relaxation, which supports the choice of yes as the correct answer.

During muscle contraction, ATP is required to detach myosin heads from actin filaments after the power stroke. This detachment is crucial for the continuation of the contraction cycle; without ATP, myosin would remain bound to actin, leading to a state known as rigor mortis. Additionally, ATP fuels the calcium pumps that restore calcium ions to the sarcoplasmic reticulum after muscle contraction, which is vital for muscle relaxation to occur.

Moreover, ATP contributes to the resetting of the myosin heads so they can repeatedly bind to actin, thereby facilitating the contraction process. In summary, ATP plays a critical role in enabling both the mechanical work of contraction and the restoration of muscle fibers to their resting state during relaxation.

Get further explanation with Examzify DeepDiveBeta

No

Only for contraction

Only for relaxation

Next Question

Report this question

Download CVS Practice Test PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy