Answer:
The correct answer will be option-D.
Explanation:
Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.
Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.
This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.
Thus, option-D is the correct answer.
When someone falls overboard, the action that skipper should take is to get flotation to the person and assign a spotter. <span>Have someone keep the victim in sight.</span>
The answer is when levels of the amino acid are high, it binds to the repressor, ending the synthesis of this amino acid
