PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mitochondria
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myofibrils
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T-tubules
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sarcoplasmic reticulum
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Detailed explanation-1: -Muscle fibers contain sarcolemma, sarcoplasmic reticulum, t-tubule, terminal cisternae, etc. The sarcoplasmic reticulum in the muscle fibers resembles a network of smooth endoplasmic reticulums. This Sarcoplasmic reticulum functions as a storehouse of calcium iron.
Detailed explanation-2: -The endoplasmic reticulum in the muscle fiber is known as sarcoplasmic reticulum. It stores calcium ions which regulate the muscle contraction.
Detailed explanation-3: -The breakdown of the sarcoplasmic reticulum, along with the resultant release of calcium, is an important contributor to rigor mortis, the stiffening of muscles after death. An increase in calcium concentration in the sarcoplasm can also cause muscle stiffness.