Study Questions and Answers Exam 2
What are the basic mechanisms by which neuropharmocologic agents act?oCan modify the disease processoAct at the
... [Show More] sites of actions which is the axons versus synapses and steps in synaptictransmission and effects of drugs on the steps of synaptic transmission
Transmittter synthesis is the first step in transmission. What are the other 4 steps?oTransmitter storage, transmitter release, receptor binding, and termination of thetransmissionTrue or False: Neuropharmacologic drugs have high selectivity.oTrue—the nervous system uses many different receptor typesInformation needed:oType of receptors—through which the drug actsAlpha and betaoNormal responses to the activation of those receptorsAgonists vs. antagonists
oWhat the drug in questions does to the receptor function
What are the 3 functions of ANS?oRegulates the heartoRegulates the secretory glands, saliva glands, gastric, sweat, and bronchialoIt regulates smooth muscles: bronchi, blood vessels, urogenital system, and the GI tract
What are the regulatory functions of the parasympathetic NS?oSeven regulatory functionsSlowing the heart rateIncreasing the gastric secretionsEmptying the bladderEmptying the bowelFocusing the eye for near vision,Constricting the pupilContracting the bronchial smooth muscleoIt also regulates the digestion of food, excretion of waste, control of vision andconservation of energy
What are the functions of the sympathetic NS?oRegulation of the cardiovascular systemMaintaining blood flow to the brainRedistributing blood and compensating for the loss of bloodoRegulation of body temperatureRegulates blood flow to the skinPromotes the secretion of sweatInduces piloerection (erection of the hair)oImplementation of the fight or flight reactionIncrease HR and BPBlood shuts away from the skin and viseraBronchi dilate
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Pupils dilateUse energy that had been stored
What is the baroreceptor reflex?oThe receptors near the heart monitor BP changes and send the information to the brainoThe brain then activates the Autonomic NS to restore blood pressure to normaloWhen BP falls, this reflex causes vasoconstriction and increases cardiac output.oWhen BP rises, it causes vasodilation and reduces cardiac output
Where is acetylcholine employed?oMost junctions at the peripheral nervous system
Where is epinephrine and norepinephrine released?oNorepinephrine—postganglionic neuronsoEpinephrine—adrenal medulla [Show Less]