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Acetylcholine is a
A. Hormone
B. Brain peptide
C. Neurotransmitter
D. Digestive enzyme.

Last updated date: 17th Apr 2024
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Hint:Acetylcholine is an organic chemical that serves in the brain as a chemical messenger secreted by nerve cells to give alerts to other cells like neurons, gland cells and muscle cells. Its name is taken from the ester of acetic acid and choline chemical structure.

Complete Answer:
To answer this question, first, we need to know about the acetylcholine. The acetylcholine is the neurotransmitter that is released by the presynaptic nerve fibres into the synaptic spilt which is received by the receptors on the postsynaptic nerves. It permits the transfer of the information from the earlier synaptic neuron to the postsynaptic neurons. The preganglionic and the postganglionic parasympathetic nerves are cholinergic because they secrete acetylcholine. The preganglionic nerve fibres of the sympathetic nervous system are also cholinergic.

Now, let us find the solution from the option.
Hormones are chemical message carriers that are released straightly within the blood, which bears them to organs and tissues of the body to do their functions.
Brain natriuretic peptide is a peptide hormone that is released in response to volume expansion and the increased wall stress of cardiac myocytes.
Neurotransmitters are the chemicals that transmit the nerve impulse across the synapse.
Acetylcholine is referred to as a neurotransmitter released by both ganglionic (pre, post) parasympathetic cholinergic neurons. It communicates between two neurons and between a neuron and a muscle. It makes skeletal muscles contract which are present in the peripheral nervous system. It stops the functioning of the cholinergic system in the central nervous system.

A digestive enzyme is a complicated protein which helps in breaking down food into small particles so that it can be absorbed into the human body. Most digestive enzymes are released or produced by pancreas, while a few are produced by the small intestine, mouth and stomach.

Thus, the correct option is C. i.e. Neurotransmitter.

Note:In the brain, acetylcholine functions as a neurotransmitter and as a neuromodulator. The brain has many cholinergic regions, every region with clear function like performing an essential role in memory, arousal, attention and motivation. Newly, enzymes associated with its production, degradation and cellular absorption have been moved to early sources of unicellular eukaryotes.