"Rank the sequence of cross bridge cycling, starting with the myosin-binding sites being exposed and ending with relaxation due to cross bridge cycling ending. Do not overlap any events." Sequence:

a. Calcium ions pumped into the sarcoplasmic reticulum
b. Myosin head forms cross bridge with actin
c. Myosin binding sites covered
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin head is re-energized
g. Calcium ion concentration decreases below the threshold for binding to troponin
h. ATP attaches to myosin head

Muscle contraction results from the interaction between actin and myosin filament proteins.

The sequential steps are as follow:

In conclusion, muscle contraction results from the interaction between actin and myosin filament proteins.

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Explanation:

This is the process of muscle contraction and relaxation in the muscle. The type of muscle involved is the skeleton muscle.

The process is initiated in the Central nervous system. Examples are in contraction of biceps and triceps.

It involves myosin head and actin filament coupled with the release of calcium ion from the sarcoplasm reticulum: this ion activates this process in the muscles. With the exposure of the music binding site on the acting filament, myosin is able to bind to acting filament bringing about this process.

a. ATP attaches to myosin head

b. Myosin head is re-energized

c. Myosin head forms cross bridge with actin

d. Power stroke moves thin filament

e. Cross bridges detach from actin

f. Myosin binding sites covered

g. Calcium ions pumped into the sarcoplasmic reticulum

h. Calcium ion concentration decreases below the threshold for binding to troponin.