Asked by tatiana vayserberg on Jul 14, 2024
Verified
In order for muscle relaxation to occur,
A) Ca2+ must be transported to troponin.
B) power strokes slow down.
C) the active sites on actin must be blocked.
D) Na+ must be actively transported to troponin.
E) the active sites on myosin must be uncovered.
Muscle Relaxation
The process by which muscle fibers return to their resting state after contraction, often mediated by the removal of calcium ions from the muscle cytoplasm.
Troponin
A protein involved in the regulation of muscle contraction in skeletal and cardiac muscle.
Power Strokes
Power strokes are the force-generating steps in the cycle of motor proteins, such as those involved in muscle contraction and cellular motility.
- Gain insight into the primary mechanisms that facilitate muscle contraction and relaxation.
- Understand the role of calcium in muscle contraction.
Verified Answer
MV
Martina VastolaJul 16, 2024
Final Answer :
C
Explanation :
Muscle relaxation occurs when the active sites on actin are blocked by tropomyosin, preventing myosin from binding to actin, which stops muscle contraction.
Learning Objectives
- Gain insight into the primary mechanisms that facilitate muscle contraction and relaxation.
- Understand the role of calcium in muscle contraction.