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Question

A neurotransmitter which also functions as hormone is

A
Acetylcholine
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B
Dopamine
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C
Noradrenaline/Norepinephrine
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D
Both B and C
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Solution

The correct option is B Both B and C
Noradrenaline/Norepinephrine is a chemical released by adrenal medulla as a hormone into the blood while it serves as a neurotransmitter in CNS(Central Nervous System) and sympathetic nervous system where it is released from noradrenergic neurons.
Dopamine is a neurotransmitter which is released from several neurons of the brain such as substantia niagra and others. While it serves as a hormone by its release from hypothalamus where it serves it's action on anterior lobe of pituitary by inhibiting release of prolactin.
So, the correct answer is 'Both B and C'.

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