Pathophysiology Exam 2 Practice Test Questions With Correct Answers 2022

Which of the following valves directs blood flow from the left atrium to the left ventricle? A. Mitral B. Tricuspid C. Aortic D. Pulmonic - Correct Answer-A. Mitral The layer of squamous cells that lines the cardiac chambers and valves is called the: A. myocardium B. endocardium C. epicardium D. Pericardium - Correct Answer-B. endocardium How much does the atrial kick increase the blood volume? A. 5%-10% B. 10%-15% C. 15%-20% D. 20%-25% - Correct Answer-C. 15%-20% Which of the following waves corresponds with the AV valve bulging during ventricular contraction? A. A wave B. C wave C. D wave D. V wave - Correct Answer-B. C wave (The A wave corresponds with atrial contraction, the C wave corresponds with the AV valve bulging during ventricular contraction, and the V wave corresponds to atrial filling. There is no D wave. What portions of the heart does the left anterior descending branch supply? A. Septal, anterior and apical B. Lateral and Posterior C. Lateral and septal D. Posterior and apical - Correct Answer-A. Septal, anterior, and apical What is the name for the arrangement in which separate cells of the myocardium can function together? A. Autoregulation B. Syncytium C. Ischemia D. Myocyte - Correct Answer-B. Syncytium The structure that is composed of six polypeptide chains, two heavy chains, and four light chains is called: A. actin B. tropomyosin C. troponin D. myosin - Correct Answer-D. myosin Which electrolyte is necessary for muscle contraction?