Put these events in the correct chronological sequence. (5 points) 1. Acetylchol

Question

Put these events in the correct chronological sequence. (5 points) 1. Acetylcholine binds to receptors on the motor end plate 2. Binding sites on actin are uncovered, allowing myosin to bind and carry out power strokes 3. Ca" binds to troponin, pulling on tropomyosin 4. Ca+i arcoplasmic reticulum 5. Ca is pumped (resequestered) into the sarcoplasmic reticulum 6. Chemically-regulated ion channels open, causing depolarization 7. End plate potentials trigger action potential(s) 8. Force decreases 9. Force increases 10. Transverse tubules convey potentials into the interior of the cell released from the s

Explanation / Answer

Ans

Events in chronological order are as follows :

7) End plate potentials trigger action potential

6) Chemically regulated kon channels open causing depolarisation

1) Acetylcholine binds to receptors on the motor end plate

10) Transverse tubules convey potentials into the interior of the cell

4) Calcium is released from the sarcoplasmic reticulum

3) Calcium binds to troponin, pulling on tropomyosin

2) Binding sites on actin are uncovered, allowing myosin to bind and carry out power strokes

9) Force increases

5) Calcium is pumped ( resequestered) into the sarcoplasmic reticulum

8) Force decreases

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