Muscle contraction is accomplished by a mechanism known as the cross-bridge cycle,in which myosin heads bind to actin and cause the actin filaments to move across the myosin filaments.Which of the following is capable of providing the energy needed for this process? A)ATP B)FAD C)NAD⁺ D)enzymes

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Quizplus · Accepted Answer

ATP is the primary source of energy for muscle contraction. The ATP molecule provides energy to the myosin heads, which bind to the actin filaments and cause them to slide across the myosin filaments. FAD and NADH are involved in the process of cellular respiration, but they do not directly provide energy for muscle contraction. Enzymes catalyze chemical reactions but do not provide energy.

Muscle Contraction Is Accomplished by a Mechanism Known as the Cross-Bridge