Place the following six events of muscle contraction in order. 1. Transmitter su

Question

Place the following six events of muscle contraction in order.

1. Transmitter substance diffuses across synaptic cleft at neurotransmitter juntion.
2. actin and mysin interact
3. Permiablity of the muscular mebrane is altered
4. impulse arrives at the synapse bt the motor neuron and the muscle fiber
5. Scarcoplasmic reticulum releases strored calcium ions
6. Action potential travels along membrane of the muscle fiber into the tubules.

a. 1-4-3-6-2-5
b. 4-1-3-6-5-2
c. 2-5-6-3-1-4
d. 4-1-5-3-2-6
e. 4-1-5-3-6-2

Explanation / Answer

The following are the six events of muscle contraction in order: 1. Impulse arrives at the synapse between the motor neuron and the muscle fiber. 2. Transmitter substance diffuses across synaptic cleft at neurotransmitter junction. 3. Permeability of the muscular membrane is altered. 4. Action potential travels along membrane of the muscle fiber into the tubules. 5. Sarcoplasmic reticulum releases stored calcium ions. 6. Actin and myosin interact. Hence option (b) is correct answer. 4-1-3-6-5-2

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