NURS 5315 ADV PATHO EXAM 3 SET 1 with Correct Solutions 2024

NURS 5315 ADV PATHO EXAM 3 SET 1 with Correct Solutions 2024 Cardiac Blood Flow - Answer -o From body o Through: Vena cavas Right atrium Tricuspid valve Right ventricle Pulmonic valve Pulmonary artery o To lungs Pulmonary vein Left atrium Mitral valve Left ventricle Aortic valve o Back to body Cardiac Anatomy - Answer -The heart is the size of a closed fist 2/3 of the heart is to the left of the midline1/3 under the sternum heart layers - Answer -Endocardium ( inner) myocardium ( middle) Pericardium ( outer) Cardiac action potential: phase 0 - Answer -rapid depolarization Sodium influx d/t voltage-gated sodium channels opening Cardiac action potential: phase 1 - Answer -initial repolarization of cells voltage gated sodium channels closed voltage gated potassium channels open Potassium leaves cell slowly Cardiac action potential: phase 2 - Answer -plateau phase voltage gated calcium channels open influx of calcium into the cell balances potassium efflux calcium influx triggers more calcium from sarcoplasmic reticulum > myocardial contraction Cardiac action potential: phase 3 - Answer -Rapid Repolarization w/ potassium efflux voltage gated potassium channels open