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What directly contributes to the phenomenon of muscles remaining in a contracted state for a brief period of time?

What directly contributes to the phenomenon of muscles remaining in a contracted state for a brief period of time?<br/>

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This question is part of Muscular System AP Biology Post Quiz
Asked by Dwiegand, Last updated: Sep 08, 2020

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2 Answers

j.Barbara

j.Barbara

j.Barbara
J.Barbara

Answered Mar 07, 2018

The motion of contracted muscles happens when myosin head binds with actin and pulls it inward. This type of motion requires the use of energy that is provided by ATP. On the other hand, in order for the muscle to relax, it also needs the energy produced by ATP to break the break the bonds between the two. Without ATP, the muscles will remain contracted until ATP produces the energy that is needed to break the bonds.

ATP or adenosine triphosphate is considered the “molecular currency” of the energy that is transferred between our cells. This nucleotide provides the power that our body needs to perform different activities such as protein construction, muscle contraction, cell communication, and substrates transportation.

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John Smith

John Smith

John Smith
John Smith

Answered Apr 25, 2017

No ATP to break bonds between the actin and myosin
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