Nbce – Physiology| 206 Questions| With Complete Solutions

What is the pacemaker of the heart? CORRECT ANSWERS: SA node What is the path of electricity in the heart? CORRECT ANSWERS: SA node, AV node, bundle of His/bundle branches, purkinje fibers What innervates the SA node? CORRECT ANSWERS: Vagus What are the most clinically significant heart murmurs? CORRECT ANSWERS: diastolic murmurs Systole CORRECT ANSWERS: contraction Diastole CORRECT ANSWERS: relaxation Laminar flow CORRECT ANSWERS: streamline, steady rate, all layers remain in same distance from BV wall, smooth vessels Turbulent Flow CORRECT ANSWERS: blood flowing in all directions in BV, caused by obstruction, get "eddy currents" What number measures turbulent flow? CORRECT ANSWERS: Reynold's number Cardiac output CORRECT ANSWERS: amount of blood pumped by heart in a period of time, CO = stroke vol. x HR Stroke Rate CORRECT ANSWERS: amount of blood pumped out of each ventricle per beat, avg. = 70-80 mL How is heat lost at room temperature? CORRECT ANSWERS: radiation, evaporation, conduction to air, convection What is the blood supply to the kidney CORRECT ANSWERS: abdominal aorta - renal artery - interlobar - arcuate - interlobular - afferent arteriole - glomerulus - efferent arteriole - peritubular capillaries - venules - interlobular vein - arcuate vein - interlobar vein - renal vein - IVC What is the functional unit of the kidney? CORRECT ANSWERS: nephron Function of Bowman's Capsule CORRECT ANSWERS: filtration Function of PCT CORRECT ANSWERS: reabsorption Function of Loop of Henle CORRECT ANSWERS: counter current concentration