Fill-in the blanks with numbers (1-7) to put the events of the actomyosin cycle in order from beginning to end:
a) _____: Myosin releases P_i.
b) 1 : Myosin binds ATP.
c) _____: Myosin head bonds tightly to thin actin filament.
d) _____: Myosin power stroke occurs.
e) _____: Myosin-actin interaction is broken.
f) _____: Myosin head pivots to a high-energy state.
g) _____: Myosin hydrolyzes ATP to ADP and P_i.

Which statement best describes the sliding filament model of a sarcomere contraction?

Muscle contraction is directly caused by:

Which of the following does not occur during a muscle contraction?

Which of the following is false concerning the sliding-filament model of muscle contraction?

Which of the following statements correctly describes the relationship between cytosolic [Ca2+] and the corresponding sarcomere response?