In order to stimulate muscle contraction, the axon terminal of the motor neuron

Question

In order to stimulate muscle contraction, the axon terminal of the motor neuron must release ------(1)------.

(A) actin (B) Ca^2+ (C) tropomyosin (D) acetylcholine

This density packed bundle of protein fibers includes _____(2)______.

(A) acetylcholine receptors (B) tropomyosin and troponin (C) Ca^2+ channels (D) myoglobin and hemoglobin

The membrane of these internal compartments contain _______(3)_______.

(A) voltage-gated Ca^2+ channels (B) actin and myosin (C) tropomyosin and troponin (D) acetylcholine receptors

In order to stimulate muscle contraction, the axon terminal of the motor neuron must release This densely packed bundle of protein fibers includes The membranes of these internal compartments contain

Explanation / Answer

1. In order to stimulate muscle contraction,the axon terminals of motor neurons must release acetylcholine(option d).(it is released from the axon terminal into the synaptic cleft). 2.the densely packed bundle of protein fibers includes tropomysin and troponin(option b)(there are 3 types of proteins forms myofibrils they are contractile(actin and myosin), regulatory proteins (troponin and tropomyosin) and structural proteins. 3.The membrane of these internal compartment contains voltage gated ca2+ channels( option a)(the sarcoplamic membrane is a network of tubules that extend throughout muscle cells these t tubules are extension of the cell membrane).

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