Muscle cells shorten because
A) they get bigger in diameter.
B) sodium ions flow along the surface of the actin molecule.
C) myosin molecules shorten.
D) actin molecules slide by myosin molecules.
Correct Answer:
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Q37: The sense of touch
A) is evenly distributed
Q38: Which of the following kinds of receptors
Q39: Muscles are in antagonistic sets because
A) muscles
Q40: Which of the following is true for
Q41: Calcium ions are involved in muscle contraction
Q43: Which of the following muscles is under
Q44: In a muscle organ like the biceps
Q45: Smooth muscle
A) can stay contracted for long
Q46: Skeletal muscle
A) is involuntary.
B) is voluntary.
C) is
Q47: Cardiac muscle
A) does not respond to nervous
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