Match each term with its corresponding description regarding the sliding-filament theory.
-The stimulus to contract the muscle is carried inside the muscle by this structure

Question

Quizplus · Accepted Answer

T-tubules carry the stimulus for muscle contraction from the nervous system to the muscle fibers.

Answer: F
 Calcium binds to troponin, causing tropomyosin to shift and expose binding sites on actin, allowing the cross-bridges of myosin to attach and initiate muscle contraction.

Answer: A and H
 Troponin and tropomyosin are regulatory proteins that work together to help control muscle contraction by blocking or exposing binding sites on actin.

Answer: E
 ATP is hydrolyzed by myosin during muscle contraction, providing the energy for the cross-bridges to change shape and pull on actin.

Answer: G
 Cross-bridges are the projections on myosin that attach to actin during muscle contraction.

Match Each Term with Its Corresponding Description Regarding the Sliding-Filament