PHAR 200 Chapter Notes - Chapter 2: Sympathetic Nervous System, Peripheral Nervous System, Adrenal Medulla
18 Feb 2017
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Network of interconnected nerve fibres that function to regulate many bodily functions. Central nervous system: brain and spinal cord. Peripheral nervous system: made up of somatic nervous system. Connects nerve fibres to voluntary muscles and provides brain with feedback in the form of sensory info: and autonomic nervous system. Connects cns with all internal organs that people do(cid:374)"t (cid:374)or(cid:373)ally ha(cid:448)e (cid:272)o(cid:374)trol o(cid:448)er. The ans is regulated via the sympathetic nervous system. Prepares body to respond to emergencies, strong emotion, strenuous activity. Concerned with the mobilization and exertion of energy. Called a catabolic system: normal activity of organs, counteracts the sympathetic nervous system. Restores the body to its normal state: processes of digestion, relaxation, drowsiness, concerned with the conservation of body energy. Afferent: sensory impulses from the peripheral nerve endings to the brain. Efferent: motor impulses to the extremities and internal organs to carry out necessary movement. Located above point where spinal cord enters skull.
