After detachment, what energizes the myosin head for the next cycle?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Explore the Muscular System with our Anatomy and Physiology Test. Use flashcards and multiple-choice questions for practice. Prepare effectively with hints and detailed explanations. Ace your exam!

Multiple Choice

After detachment, what energizes the myosin head for the next cycle?

Explanation:
The energy comes from ATP hydrolysis. After detachment, the myosin head binds ATP and then hydrolyzes it to ADP and inorganic phosphate, which re-cocks the head into a high-energy, primed conformation. This energized state allows the head to form a new cross-bridge with actin, enabling the next contraction cycle once Pi is released and the power stroke occurs.

The energy comes from ATP hydrolysis. After detachment, the myosin head binds ATP and then hydrolyzes it to ADP and inorganic phosphate, which re-cocks the head into a high-energy, primed conformation. This energized state allows the head to form a new cross-bridge with actin, enabling the next contraction cycle once Pi is released and the power stroke occurs.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy