PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sarcoplasmic Reticulum
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T Tubules
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Mitochondria
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Fascicle
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Detailed explanation-1: -Skeletal muscle function is governed by an action potential that releases calcium stored in the sarcoplasmic reticulum. This calcium then binds to tropomyosin and allows for the interaction of myosin and actin in the sarcomere, leading to muscle contraction.
Detailed explanation-2: -The sarcoplasmic reticulum (SR) constitutes the main intracellular calcium store in striated muscle and plays an important role in the regulation of excitation-contraction-coupling (ECC) and of intracellular calcium concentrations during contraction and relaxation.
Detailed explanation-3: -The sarcoplasmic reticulum of skeletal muscle cells is a highly ordered structure consisting of an intricate network of tubules and cisternae specialized for regulating Ca2+ homeostasis in the context of muscle contraction.