Examlex
Explain the correlation between exercise and mortality rates in middle-adulthood.
Acetylcholine
A neurotransmitter in both the central and peripheral nervous systems that plays a key role in arousal, attention, memory, and motivation.
Somatic Nervous System
A part of the peripheral nervous system that controls voluntary movements of the body through the control of skeletal muscles.
Autonomic Nervous System
The part of the nervous system that controls involuntary functions such as heart rate, digestion, and respiratory rate, divided into the sympathetic and parasympathetic systems.
Chemical Synapses
Specialized junctions through which neurons signal to each other and to non-neuronal cells, allowing the transmission of chemical messengers (neurotransmitters).
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