Question

How ATP work on our muscle for muscle contraction.

Answer 1

Adenosine triphosphate (ATP) transports chemical energy within cells for metabolism.

Explanation:

Adenosine triphosphate (ATP) is thought of as the "molecular currency" for energy transfer within the cell.

Function:

ATPs are used as the main energy source for metabolic functions. They are consumed by energy-requiring (endothermic) processes and produced by energy-releasing (exothermic) processes in the cell. It does this by giving either losing or gaining a phosphate group.

ATP (high energy)

⇔

ADP (low energy)
The pair is ADP (adenosine diphosphate) with two phosphates and ATP (adenosine triphosphate). Energy is transferred as a matter of how many phosphate group the molecules have. ATP energizes the endothermic process thus becoming ADP. While ADP can take up energy from an exothermic process and gain a phosphate (phosphorylated) to become ATP.

Structure:
ATP is made up of an one adenosine - ribose sugar and adenine - that is attached to three phosphate group (triphosphate).

Answer 2

ATP prepares myosin for binding with actin by moving it to a higher-energy state and a "cocked" position.

Once the myosin forms a cross-bridge with actin, the Pi disassociates and the myosin undergoes the power stroke, reaching a lower energy state when the sarcomere shortens.

ATP must bind to myosin to break the cross-bridge and enable the myosin to rebind to actin at the next muscle contraction.