Examlex
Choose the one most appropriate letter for each.
-humans
Hunger
A physical sensation or condition resulting from the body's need for food.
Serotonin
A neurotransmitter involved in the regulation of mood, sleep, appetite, and pain perception, among other physiological processes.
PYY
A hormone concerned with hunger and the lack of hunger, part of the neuroendocrine system that influences appetite and food intake.
Serotonin
A neurotransmitter in the brain that affects mood, emotion, and sleep.
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