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does Muscle Relavation why fequire ATPP A TP.P

does Muscle Relavation why fequire ATPP A TP.P

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Why does Muscle Relaxation require ATP?** This question explores the biological mechanisms behind muscle function. Muscle relaxation is an active process that involves the detachment of myosin heads from actin filaments, facilitated by ATP. During muscle contraction, ATP is hydrolyzed to provide energy for the myosin heads to change position and bind to actin. For muscle relaxation to occur, new ATP molecules must bind to the myosin heads, causing them to release the actin filaments. Subsequently, calcium ions are pumped back into the sarcoplasmic reticulum, which also requires ATP, ensuring the muscle fiber returns to its resting state. Understanding this process highlights the essential role of ATP in both contraction and relaxation phases of muscle activity.
Transcribed Image Text:**Why does Muscle Relaxation require ATP?** This question explores the biological mechanisms behind muscle function. Muscle relaxation is an active process that involves the detachment of myosin heads from actin filaments, facilitated by ATP. During muscle contraction, ATP is hydrolyzed to provide energy for the myosin heads to change position and bind to actin. For muscle relaxation to occur, new ATP molecules must bind to the myosin heads, causing them to release the actin filaments. Subsequently, calcium ions are pumped back into the sarcoplasmic reticulum, which also requires ATP, ensuring the muscle fiber returns to its resting state. Understanding this process highlights the essential role of ATP in both contraction and relaxation phases of muscle activity.
Expert Solution
Introduction:

The energy source for muscular movement is ATP, even though other co-factors and some enzymes are needed for the whole process, without ATP no movement - contraction and relaxation cycle - will be possible. 

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