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Which of the following is incorrect rega...

Which of the following is incorrect regarding muscle contraction?

A

Actin and myosin make actomyosin.

B

Phosphate reserve comes from phosphocreatine.

C

Chemical energy is converted into mechanical energy.

D

Mechanical energy is converted into chemical energy.

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statement regarding muscle contraction is incorrect, we will analyze each option provided. ### Step-by-Step Solution: 1. **Understanding Muscle Contraction**: Muscle contraction involves the interaction between two key proteins: actin and myosin. These proteins work together to enable muscle fibers to contract and produce movement. 2. **Evaluating the First Statement**: - The first statement claims that "actin and myosin make ectomyosin." - This statement is **correct** because ectomyosin is indeed a protein complex formed by the combination of actin and myosin. 3. **Evaluating the Second Statement**: - The second statement states that "phosphate reserves come from phosphocreatine." - This statement is also **correct**. Phosphocreatine serves as a reservoir for phosphate groups that can be used to regenerate ATP, which is essential for muscle contraction. 4. **Evaluating the Third Statement**: - The third statement asserts that "chemical energy is converted into mechanical energy." - This statement is **correct** as well. During muscle contraction, ATP (which contains chemical energy) is converted into mechanical energy, enabling muscle movement. 5. **Evaluating the Fourth Statement**: - The fourth statement claims that "mechanical energy is converted into chemical energy." - This statement is **incorrect**. In muscle contraction, it is the chemical energy (from ATP) that is converted into mechanical energy, not the other way around. ### Conclusion: The incorrect statement regarding muscle contraction is the fourth option: "mechanical energy is converted into chemical energy." ---
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