Respuesta :
Option (d) acetylcholine is the right answer.
Acetylcholine is the chemical compound released by the motor-neuron axon terminals.
Acetylcholine:
- The parasympathetic nervous system, a portion of the autonomic nervous system (a branch of the peripheral nervous system), which contracts smooth muscles, widens blood vessels, increases body secretions, and decreases heart rate, uses acetylcholine as its primary neurotransmitter.
The function of Acetylcholine:
- Acetylcholine is used at the neuromuscular junctions in the somatic nervous system to start motor neurons firing and control voluntary movements.
Chemically speaking, acetylcholine is an organic chemical that is an ester of acetic acid and choline.
Process of acetylcholine:
- Choline acetyltransferase catalyzes the reaction in which acetyl coenzyme A (acetyl CoA, which is made from glucose) and choline are combined to form acetylcholine (CAT).
- Acetylcholine is one of the neuron's transmitters, and the existence of CAT in a neuron is clear evidence of this.
To learn more about motor-neuron axon terminals visit:
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