13. A what is the mechanism that converts the Action Potential to muscle contrac

Question

13. A what is the mechanism that converts the Action Potential to muscle contraction n Action Potential in a skeletal muscle means it will1 contract, A. Na+ is released by the T Tubules B, Ca++ is released by the sarcoplasmic reticulum K+ is pump out of the muscle fiber D. Ca++ induces the fusion of synaptic vesicles 14. Release of Ca++ into the cytoplasm of a muscle cell causes A. Muscle contraction Muscle relaxation C. Muscle contraction and relaxation 15. Ca++ in the muscle cytoplasm allows A.) Actin and myosin breakdown causing contraction Actin and myosin interaction causing contraction C. Synaptic vesicle exocytosis D. ATP synthesis

Explanation / Answer

13. B. Ca++ is released from Sarcoplasmic reticulum.

Release of calcium from Sarcoplasmic reticulum into cytoplasm causes removal of Troponin from myosin binding sites on actin as a result of which myosin binds to actin and causes contraction.

14. A. Muscle contraction.

Explained above.

15. B. Actin and myosin interaction causing contraction.

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