Asked by tatiana lopez on Jun 26, 2024
Verified
Excitation-contraction coupling begins with
A) the depolarization at the T tubules.
B) the production of an action potential in the sarcolemma.
C) the release of Ca2+ from the sarcoplasmic reticulum.
D) the release of the cross-bridge.
Excitation-Contraction Coupling
The physiological process that links muscle fiber excitation to muscle contraction, primarily in skeletal and cardiac muscles.
T Tubules
Extensions of the cell membrane that penetrate into the center of skeletal and cardiac muscle cells, aiding in the transmission of electrical impulses.
Action Potential
A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane.
- Understand the principles of excitation-contraction coupling and its onset.
Verified Answer
TG
Taylor GibsonJun 28, 2024
Final Answer :
B
Explanation :
Excitation-contraction coupling starts with the production of an action potential in the sarcolemma, which then leads to a series of events resulting in muscle contraction.
Learning Objectives
- Understand the principles of excitation-contraction coupling and its onset.