Match each term with its corresponding description regarding the sliding filament theory.
-protein that has cross-bridge heads that pull on the thin fiber
A)Troponin
B)Myosin
C)Actin
D)T-tubules
E)ATP
F)Calcium
G)Cross-bridges
H)Tropomyosin
I)Acetylcholine

Question

Quizplus · Accepted Answer

Myosin is the protein that has cross-bridge heads that pull on the thin fiber.

Answer: C
 Actin is the thin fiber that is pulled on by the cross-bridge heads of myosin.

Answer: F
 Calcium is necessary for the movement of tropomyosin from the active sites on actin, allowing cross-bridge formation and muscle contraction.

Answer: G
 Cross-bridges are the heads on myosin that attach to the active sites on actin.

Answer: H
 Tropomyosin is a protein that blocks the active sites on actin, preventing cross-bridge formation and muscle contraction.

Answer: I
 Acetylcholine is a neurotransmitter that is released from motor neurons and binds to receptors on muscle fibers, initiating muscle contraction.

Note: Troponin and T-tubules are also important components of muscle contraction in the sliding filament theory, but are not described in the context of a specific function or description in the question.

Match Each Term with Its Corresponding Description Regarding the Sliding