MICROANATOMY

Detailed explanation-1: -Muscle contraction is controlled by receptors in the muscle cell membranes that respond to the neurotransmitter acetylcholine when it is released from motor neurons.

Detailed explanation-2: -However, through the nicotinic cholinergic receptors, acetylcholine allows for skeletal muscle contraction; in the adrenal glands, the release of adrenaline and norepinephrine; and in the peripheral sympathetic ganglia, activation of the sympathetic system with the release of norepinephrine.

Detailed explanation-3: -Acetylcholine is a neurotransmitter that plays a role in memory, learning, attention, arousal and involuntary muscle movement.

Detailed explanation-4: -In the peripheral nervous system, acetylcholine activates muscles, and is a major neurotransmitter in the autonomic nervous system. When acetylcholine binds to acetylcholine receptors on skeletal muscle fibers, it opens ligand gated sodium channels in the cell membrane.

Detailed explanation-5: -Contracts Smooth Muscles Acetylcholine released from nerve endings will bind to acetylcholine receptors on your smooth muscle’s surface, causing sodium channels to open. This allows action potential to travel along cells, which triggers a process that opens the L-type calcium channel.