Biology, 03.07.2020 17:01 kelfaminu

"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

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Answer from: syrai1254

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

During muscle contraction, ATP binds to myosin, which passes to a high-energy state and it allows actin and myosin to detach from each other.The sarcoplasmic reticulum (SR) is a specialized type of endoplasmic reticulum in muscle cells that acts to regulate the concentration of cytosolic calcium (Ca2+).

The sequential steps are as follow:

Myosin head forms cross bridge with actinPower stroke moves thin filamentATP attaches to myosin headCross bridges detach from actinMyosin head is re-energizedCalcium ions pumped into the sarcoplasmic reticulumCalcium ion concentration decreases below the threshold for binding to troponinMyosin binding sites covered

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

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Answer from: kimjooin02

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.

Answer from: Quest

That statement is true.

Answer from: Quest

A) it will stay on the table

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