Examlex
The preganglionic neurons of the sympathetic nervous system originate in the spinal cord from a region of gray matter called the intermediolateral cell column.
Antagonist
In pharmacology, a substance that blocks or dampens a biological response by binding to and inhibiting the effect of an agonist (the substance that would normally induce that response).
Receptor Sites
Specific locations on the surface of a cell or within the central nervous system where neurotransmitters bind to trigger a response.
Sleep
A naturally recurring state of rest for the mind and body, characterized by altered consciousness and reduced sensory and muscle activity.
Mood
A temporary state of mind or feeling that can affect an individual's perception, behavior, and cognitive functions.
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