The following is a list of the events that occur during a muscle contraction.
1. Myosin cross-bridges bind to the actin.
2. The free myosin head splits ATP.
3. Calcium ion is released from the sarcoplasmic reticulum.
4. The myosin head pivots toward the center of the sarcomere.
5. Calcium ion binds to troponin.
6. The myosin head binds an ATP molecule and detaches from the actin.
The correct sequence of these events is
a) 1, 3, 5, 4, 6, 2.
b) 3, 5, 1, 4, 6, 2.
c) 5, 1, 4, 6, 2, 3.
d) 1, 4, 6, 2, 3, 5.
e) 3, 5, 1, 2, 4, 6.
Answer: B