Which of the following is the first step in excitation-contraction coupling?
A) Exposed actin sites bind with myosin cross bridges.
B) Sodium channels open in the fibre's membrane.
C) Calcium is released from the sarcoplasmic reticulum.
D) Troponin binds calcium.
Correct Answer:
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Q27: What happens during a cross-bridge cycle in
Q28: Which statement is NOT characteristic of cross
Q29: The sarcoplasmic reticulum stores which substance when
Q31: How does an action potential rapidly spread
Q33: During contraction,asynchronous cycling of crossbridges _
A) prevents
Q34: Which molecules are involved with regulation of
Q35: Which statement concerning foot proteins is correct?
A)
Q36: Which statement concerning cross bridges is INCORRECT?
A)
Q137: Binding of which substance to myosin permits
Q221: Which events involved in muscle cell contraction
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