Concept explainers
To determine: The function of the atrioventricular valve.
Introduction: The cardiovascular system is made of different components. The heart constitutes the primary organs of the system, and the arteries, veins, and blood capillaries form the associated structures of the cardiovascular system. Among the blood vessels, the pulmonary artery, vein, and aorta form the largest and most important vessel system.
To determine: The consequences if one of the atrioventricular valves fails to close.
Introduction: The cardiac cycle begins with an action potential generated in the muscle near the atria of the heart. This region of the heart is called the sinoatrial node (SA node). The electrical impulse initiates the contraction of muscles.
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Human Physiology: An Integrated Approach (8th Edition)
- How would heart function be affected if the AV valves did not completely close during ventricular contraction?arrow_forwardWhat pressure difference between the ventricle and the atrium causes theatrioventricular valve to close?arrow_forwardHow is a cardiac impulse conducted from the right atrium to the other heart chambers?arrow_forward
- What pressure changes cause the closing of the AV valves and the opening of the semilunar valves?arrow_forwardhow does the delay of the impulse at the atrioventricular node contrribute to cardiac function?arrow_forwardHow does the delay of the impulse at theatrioventricular node contribute to cardiac function?arrow_forward
- What prevents the AV valves from swinging into the atria?arrow_forwardHow does the ECG relate to heart function (ie. electrical conduction circuit)?arrow_forwardWhich component of the conducting system is located in thefloor of the right atrium, between the right AV valve and thecoronary sinus opening?arrow_forward
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