Neuromuscular System: 1. When a muscle is relaxed, the Tropomyosin blocks the cross-bridge binding sites on Actin
2. If Ca2+ high and ATP available the Ca2+ binds to Troponin displacing Tropomyosin and making cross-bridge binding site available.
3. This allows ATP binding and contraction to take place.

Question

1. When a muscle is relaxed, the Tropomyosin blocks the cross-bridge binding sites on Actin
2. If Ca2+ high and ATP available the Ca2+ binds to Troponin displacing Tropomyosin and making cross-bridge binding site available.
3. This allows ATP binding and contraction to take place.

C.A McElhatton · Accepted Answer

Contraction Control (3 steps)

Neuromuscular System

1. When a muscle is relaxed, the Tropomyosin blocks the cross-bridge binding sites on Actin 2. If Ca2+ high and ATP available the Ca2+ binds to Troponin displacing Tropomyosin and making cross-bridge binding site available. 3. This allows ATP binding and contraction to take place.

Contraction Control (3 steps)

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