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Physiology Lecture 6: Parasympathetic Nervous SystemWhat action is caused by CN III?Constriction of the pupilWhat 2 actions are caused by CN VII?Secretes tearsStimulates watery salivation – Submandibular and Sublingual GlandsWhat action is caused by CN IX?Stimulates watery salivation – Parotid GlandWhat 6 actions are caused by CN X?Constricts airwaysSlows heart rateStimulates digestionStimulates secretion of insulin and digestive enzymesStimulates activity of the intestinesStimulates gallbladder to release bileWhat actions are caused by the Splanchnic Nerves (S2-S4)Contraction of bladder wall, relaxation of internal sphincterDilates blood vessels in intestines and rectumStimulates erectionStimulates sexual secretions in femalesWhat is the Agonist and the Antagonist for the Nicotinic Receptor?Agonist: NicotineAntagonist: HexamethoniumWhat is the Agonist and the Antagonist for Muscarinic Receptors?Agonist: MuscarineAntagonist: ScopolamineGiven the structures, name which Muscarinic Receptor is responsible for the Parasympathetic Innervation:Heart?M2Smooth Muscle, Endothelium?M3Ganglia, CNS?M1Sweat and Lacrimal Glands?M3When you have Mushroom Poisoning, Cholinergic Symptoms occur. What types of symptoms are examples of this? What type of drug would you give?Sweating, Salivation, Lacrimation, Vomiting, Abdominal Cramps, Diarrhea, Urination, MiosisYou want to give a Muscarinic Antagonist – AtropineBelladonna Drops are from the Deadly Nightshade plant and used to make women beautiful by dilating their eyes. What causes this affect?Atropine – muscarinic antagonist – blocks the pupillary constrictor muscle, which causes the Sympathetic System to take over completely, dilating the eyeWhich muscarinic receptor targets the heart?M2Which muscarinic receptor targets all of the arteries?M3Which muscarinic receptor targets the eye?M3Which muscarinic receptor constricts the bronchioles?M3Which muscarinic receptor causes erection?M3Does the Detrusor muscle relax or contract when the PNS is predominating?Detrusor contractsDoes the Internal Sphincter Muscle simultaneously relax or contract when the PNS is predominating?Relaxes ................
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