PHAR 100 Lecture Notes - Lecture 7: Somatic Nervous System, Sympathetic Nervous System, Autonomic Nervous System

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Describe the organization of the autonomic nervous system. Sensory neurons detect signal and send it to cns to be processed. Motor neurons cns send signal to effecter organ/ gland. Autonomic nervous system controls involuntary responses by influencing organs, glands and smooth muscle. Explain the function of the somatic nervous system. Somatic nervous system controls voluntary movement by acting on skeletal muscle. Achetylcholine released as neuromuscular junction and binds to nicotinic receptors. Describe the effects of the sympathetic and parasympathetic nervous systems. Effects dilates pupils, increases heart rate, increases rate of respiration, increases sweating, dry mouth, inhibits digestion, bladder and sex organs/ stimulates release of glucose and secretes epinephrine and norepinephrine. Effects constricts pupils, constricts breathing, stimulates salivation, slows heart rate, stimulates digestive system/gallbladder, contracts bladder and stimulates sex organs. Discuss the various neurotransmitters and receptors involved in the autonomic nervous system. All autonomic ganglia have nicotinic receptors, they conduct the action potential to postganglionic neuron.

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