In muscle cells, depolarization leads to what immediate event?

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 $25.99Unlock all

Study for the NATA BOC Domain 2 Clinical Evaluation and Diagnosis Test. Utilize our comprehensive flashcards and multiple-choice quiz features; each question comes with hints and thorough explanations. Prepare effectively for your certification exam!

Multiple Choice

In muscle cells, depolarization leads to what immediate event?

Explanation:
Depolarization of the muscle cell membrane triggers the process that links electrical signals to muscle shortening. This depolarization activates the excitation–contraction coupling, causing calcium to be released from the sarcoplasmic reticulum into the cytosol. The rise in calcium enables cross-bridge cycling between actin and myosin, generating tension and producing contraction. relaxation would require calcium to be removed back into the sarcoplasmic reticulum and the cross-bridges to detach, hyperpolarization is a more negative membrane change, and cell death is not the immediate event produced by depolarization.

Depolarization of the muscle cell membrane triggers the process that links electrical signals to muscle shortening. This depolarization activates the excitation–contraction coupling, causing calcium to be released from the sarcoplasmic reticulum into the cytosol. The rise in calcium enables cross-bridge cycling between actin and myosin, generating tension and producing contraction. relaxation would require calcium to be removed back into the sarcoplasmic reticulum and the cross-bridges to detach, hyperpolarization is a more negative membrane change, and cell death is not the immediate event produced by depolarization.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy