Match each term with its corresponding description regarding the sliding filament theory.
-chemical released by the motor neuron that initiates the stimulus for a muscle contraction
A)Troponin
B)Myosin
C)Actin
D)T-tubules
E)ATP
F)Calcium
G)Cross-bridges
H)Tropomyosin
I)Acetylcholine

Question

Quizplus · Accepted Answer

Acetylcholine is the chemical released by the motor neuron to initiate the stimulus for a muscle contraction.

Answer: F
 Calcium is the ion that binds to the troponin-tropomyosin complex, causing the tropomyosin to move away from the myosin-binding sites on actin, allowing myosin to bind and initiate muscle contraction.

Answer: E
 ATP provides energy for the power stroke of the myosin head, allowing it to pull the actin filament towards the center of the sarcomere.

Answer: G
 Cross-bridges are formed when the myosin head binds to the actin filament, allowing it to slide past the myosin and create muscle contraction.

Answer: A and H
 Troponin and tropomyosin are proteins that help regulate muscle contraction by blocking the myosin-binding sites on actin in the absence of calcium ions.

Match Each Term with Its Corresponding Description Regarding the Sliding