A) hormone
B) transmitter hormone
C) polysaccharide
D) enzyme.
Correct Answer: B
Solution :
: Dopamine is a catecholamine-synthesized by the adrenal gland and secreted as a synaptic transmitter. In the brain, dopamine as a neurohormone released by the hypothalamus functions as a neurotransmitter, activating dopamine receptors. Its main function as a hormone is to inhibit the release of prolactin from the anterior lobe of the pituitary. Dopamine can be supplied as a medication that acts on the sympathetic nervous system, producing effects such as increased heart rate and blood pressure. As a member of the catecholamine family, dopamine is a precursor to epinephrine (adrenaline) and norepinephrine (noradrenaline) in the biosynthetic pathways for these neurotransmitters.
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