THE PSYCHOLOGY OF EMOTIONS
STATES OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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acetylcholine
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myosin
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actin
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calcium
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Detailed explanation-1: -(A) Neurotransmitter (acetylcholine, ACh) released from nerve endings binds to receptors (AChRs) on the muscle surface. The ensuing depolarization causes sodium channels to open, which elicits an action potential that propagates along the cell.
Detailed explanation-2: -In order to contract a muscle, an electrical impulse must travel down a motor neuron until it arrives at the end of the cell. It then triggers the release of acetylcholine from tiny vesicles so that the neurotransmitter can cross the synaptic cleft and bind to receptors on the other side of the cell.
Detailed explanation-3: -When acetylcholine binds to acetylcholine receptors on skeletal muscle fibers, it opens ligand gated sodium channels in the cell membrane. Sodium ions then enter the muscle cell, stimulating muscle contraction.