PHIS 206 1st Edition Lecture 9 Outline of Last Lecture I Afference II Sensation v Perception III Sensory System IV Receptor Generator Potentials V How Receptors Work VI Receptor Properties VII Afferent Delivers to Brain VIII Sensory Neuron Input IX Sense Pain X Perception XI Autonomic Nervous System XII Somatic Nervous System XIII 2 Neurons Autonomic Nervous System Outline of Current Lecture I 2 Neurons Autonomic Nervous System II Autonomic Stimulation III Somatic Nervous System IV Neurotoxins Current Lecture I II 2 Neurons Autonomic Nervous System cholinergic neurons neurons that release Ach catecholaminergic neurons neurons that release norepinephrine Autonomic Stimulation neurons frequently stimulate inhibit many cells or cells close to its neighbors 2 Systems that generate action potentials Parasympathetic input is highest when in vegetation state digesting gastrointestinal Sympathetic input flight or fight responses prepares you to deal with physical activity o startled stage of sympathetic dominance These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute III IV o increase in respiration o system to muscles and away from gastrointestinal o plasma glucose goes up Somatic Nervous System motor neurons that innovate the skeletal muscle motor neuron can ONLY stimulate NO inhibition everything happens above level of somatic neurons somatic neurons final common pathway that everything muscle wise goes through to generate action potentials axon terminals of motor neurons boutons store Ach and are analogous to rest of muscles o When action potential reaches bouton bouton release Ach in fluid and go to catecholaminergic neurons o The AChase degenerates Ach until it is no longer a stimulus Neurotoxins poisons that act on neurons Venom of Black Widow Spiders causes massive release of Ach in autonomic and somatic systems Consequences o lethal in children terminal diaphragm put into contraction and cannot exhale o cause of death respiratory arrest o reduces blood flow Botulinum Toxin sometimes food poisoning cases very toxic even in little amounts opposite of Black Widow Spider venom o blocks release of Ach from neurons o muscles cannot be stimulated cannot breath DEATH Curare Amazonian Indian arrows prevents Ach from interacting causes respiration problems
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