Match each term with its corresponding description regarding the sliding-filament theory.
-Compound that supplies the energy for muscle contraction

Question

Quizplus · Accepted Answer

ATP supplies the energy for muscle contraction.

Answer: F
 Calcium triggers muscle contraction by binding to troponin.

Answer: B
 Myosin forms cross-bridges with actin filaments, which results in muscle contraction.

Answer: D
 T-tubules are invaginations in the sarcolemma that allow for rapid transmission of muscle impulses.

Answer: A
 Troponin is a protein complex that is important in regulating muscle contraction by binding to calcium.

Answer: G
 Cross-bridges are formed when myosin heads bind to actin filaments and pull them closer together.

Answer: H
 Tropomyosin is a protein that wraps around actin filaments and helps regulate muscle contraction by blocking the myosin-binding sites.

Answer: I
 Acetylcholine is a neurotransmitter that is released at the neuromuscular junction and initiates muscle contraction by binding to receptors on the sarcolemma.

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