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APHY 201 - Heart Quiz 2024 Final Exam Preparation Study Guide
Typology: Exams
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The law of the heart (Starling) accounts for: - Answer>>the ventricles' ability to increase cardiac output as venous return increases The only vessels that provide direct access to nearly every cell in the body are the __________. - Answer>>capillaries Cardiac output is __________. - Answer>>the amount of blood pumped out of each ventricle in one minute The mitral and aortic valves simultaneously open during: - Answer>>no part of the cardiac cycle The period of time that immediately follows the ejection phase of a cardiac cycle is called: - Answer>>isovolumetric relaxation All four intercardiac valves are closed during: - Answer>>isovolumetric contraction and isovolumetric relaxation According to the carotid baroreceptor reflex: - Answer>>an increase in carotid pressure decreases heart rate and as a result cardiac output. For a blood pressure of 140/70 mm Hg, the mean arterial pressure is: - Answer>>93.3 mm Hg From the perspective of blood returning from the systemic circuit, identify the correct sequence of blood flow through the chambers of the heart. - Answer>>right atrium, right ventricle, lungs, left atrium, left ventricle
Most neural controls of blood pressure involve input from baroreceptors, which are sensitive to __________. - Answer>>changes in blood pressure The cardiac cycle includes all of the following events EXCEPT __________. - Answer>>the number of times the heart beats in one minute An increase in blood pressure within the venae cavae and right atrium signifies an increase in venous return and reflexively: - Answer>>increases heart rate (the Bainbridge reflex) When the mitral valve closes, it prevents the backflow of blood from the __________. - Answer>>left ventricle into the left atrium Systole is defined as: - Answer>>contraction of cardiac muscle The major long-term mechanism of blood pressure control is provided by the __________. - Answer>>kidneys Blood flow through the pulmonary circuit (volume/time) equals blood flow through the systemic circuit (volume/time) even though pressure for the pulmonary circuit is nearly five times less than pressure for the systemic circuit. The reason is: - Answer>>pulmonary resistance is nearly five times less than systemic resistance Which of the following is the major force generating blood flow? - Answer>>the pumping action of the heart The inferior vena cava brings blood from the lower regions of the body and empties into the __________. - Answer>>right atrium The period of time in the cardiac cycle that immediately precedes the ejection phase of ventricular systole is a very short phase called: - Answer>>isovolumetric contraction