Examlex
The ___________ is the source of radiation in the x-ray tube.
Melatonin
A substance secreted by the pineal gland that controls the patterns of sleeping and waking.
Dopamine
A neurotransmitter associated with pleasure, movement, and attention in the brain.
Cortisol
Cortisol is a steroid hormone released by the adrenal glands in response to stress and has multiple functions including regulating metabolism and immune response.
Leptin
A hormone produced by adipose (fat) cells that helps to regulate energy balance by inhibiting hunger, which in turn diminishes fat storage in adipocytes.
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