Endoplasmic reticulum or sarcoplasmic reticul | vedclass

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Question

(D) The sarcoplasmic reticulum $(SR)$ is a specialized type of endoplasmic reticulum found in muscle cells. It acts as a storage site for calcium ions

Vedclass · Accepted Answer

All the above

Vedclass · Answer

(D) The sarcoplasmic reticulum $(SR)$ is a specialized type of endoplasmic reticulum found in muscle cells. It acts as a storage site for calcium ions $(Ca^{2+})$. During muscle excitement,calcium ions are released from the $SR$ into the sarcoplasm,which triggers muscle contraction. During muscle relaxation,these calcium ions are actively pumped back into the $SR$. Since the $SR$ is involved in all these processes,the correct answer is $D$.

Column-$I$	Column-$II$
$(a)$ Floating Ribs	$(i)$ Located between second and seventh ribs
$(b)$ Acromion	$(ii)$ Head of the Humerus
$(c)$ Scapula	$(iii)$ Clavicle
$(d)$ Glenoid cavity	$(iv)$ Do not connect with the sternum

Endoplasmic reticulum or sarcoplasmic reticulum plays a major role during

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