NEET BIOLOGY

Detailed explanation-1: -Complete answer: On stimulation of the skeletal muscle, calcium is promptly made accessible for binding to troponin from sarcoplasm ic reticulum. Sarcoplasmic reticulum stores calcium ions and liberates them into the sarcoplasm on the generation of action potential throughout muscle contraction.

Detailed explanation-2: -On stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from. No worries!

Detailed explanation-3: -Calcium ions at rest are stored in the sarcoplasmic reticulum (SR) from which they are rapidly released upon the depolarisation of the sarcolemmal and transverse (T-) tubular membranes of the muscle cell.

Detailed explanation-4: -When the muscle is stimulated, calcium ions are released from its store inside the sarcoplasmic reticulum, into the sarcoplasm (muscle ). Invaginations of the plasma membrane (sarcolemma) of the muscle fibres are called T (or transverse) tubules.

Detailed explanation-5: -Depolarization of the sarcolemma (muscle membrane) caused by nerve stimulation causes calcium ions to be released from the sarcoplasmic reticulum.