BIO 210 Lab 13 Questions Word eferences Mailings Review View Tell me what you wa

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BIO 210 Lab 13 Questions Word eferences Mailings Review View Tell me what you want to do A Aa- :.y.A- :-. .-_ . INormal!No Spac Heading 2 Title Subti Heading 1 Paragraph Styles BIO 210 LAB #11-NERVOUS SYSTEM (PART 2): HUMAN BRAIN PART B: CRITICAL THINKING QUESTION Digoxin (Lanoxin), a drug that stimulates the vagus nerve, has been administered to a patient. What effect would this drug have on the patient's pulse rate? Digoxin helps control the rate and also the rhythm of the heart. The vagus nerve is BIO 210 LAB #12-NERVOUS SYSTEM (PART 3): SHEEP BRAIN

Explanation / Answer

vagus is the nerve which shows parasympathetic activity mostly.the vagal nerve stimulation leads to the activation of cardiac inhibitory center which increases the parasympathetic activity and decreases the sympathetic activity(by inhibiting cardiac stimulatory center)inreased parasympathetic activity leads to rise in levels of acetyl choline.this acetyl choline acts on M1 receptor of heart.it results in decrease SA node triggering.

digoxin inhibitit Na+-k+ -ATPase this leads to increase in the intracellular sodium.to inrease sodium conc extracellularly the sodium calicuim exchange occurs.this leads to increased intracellular calicuim thus increase the contratility of heart

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