Examlex
Differentiate between pleiotropic and polygenic genes.
Chemical Messengers
Compounds such as hormones and neurotransmitters that transmit signals from one cell or organism to another, affecting physiological activities.
Hormones
Chemical messengers produced by endocrine glands that regulate various bodily functions and processes.
Sympathetic Nervous System
A part of the autonomic nervous system that prepares the body for action by accelerating the heart rate, constricting blood vessels, and raising blood pressure.
State of Arousal
A condition of heightened physiological and psychological activity, including alertness and physical preparedness.
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