EBK HUMAN ANATOMY
8th Edition
ISBN: 9780100799554
Author: Martini
Publisher: YUZU
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Chapter 21, Problem 5RC
Summary Introduction
To review:
The reason behind the absence of muscular braces in semilunar valves as compared to those found in the AV valves.
Introduction:
The heart valve generally allows the blood to flow in one direction via the heart and the four valves present in the heart basically determine the pathway of the flow of the blood through the heart. The opening and the closing of the heart is basically for the incumbent on the differential blood pressure on each side.
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Why are the tendinous cords required for the proper functioning of the AV valves?
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Why are the chordae tendineae required for the properfunctioning of the AV valves?
Chapter 21 Solutions
EBK HUMAN ANATOMY
Ch. 21 - Prob. 1RFTCh. 21 - Prob. 2RFTCh. 21 - Prob. 3RFTCh. 21 - Prob. 4RFTCh. 21 - Prob. 5RFTCh. 21 - Match each numbered item with the most closely...Ch. 21 - Prob. 7RFTCh. 21 - Prob. 8RFTCh. 21 - Prob. 9RFTCh. 21 - Match each numbered item with the most closely...
Ch. 21 - Prob. 11RFTCh. 21 - Prob. 12RFTCh. 21 - Which of the following is not true of intercalated...Ch. 21 - Prob. 14RFTCh. 21 - The pacemaker cells of the heart are located in...Ch. 21 - Prob. 16RFTCh. 21 - Prob. 1RCCh. 21 - If the papillary muscles fail to contract, (a)...Ch. 21 - Prob. 3RCCh. 21 - Prob. 4RCCh. 21 - Prob. 5RCCh. 21 - Define a pacemaker cell, and list the group of...Ch. 21 - Prob. 7RCCh. 21 - Prob. 8RCCh. 21 - Why are nodal cells unique? What is their...Ch. 21 - What is the effect of NE release on cardiac...Ch. 21 - Prob. 1CTCh. 21 - 2. Lee is brought to the emergency room suffering...Ch. 21 - Prob. 3CT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What are the difference between contractile cells of the heart and electrical cells responsible for generation and conduction of impulses. Why is the cardiac action potential propagated more slowly in an AV node cell than in an atrial or ventricular myocyte? How are the channels and ions that are responsible for depolarization and repolarization work? How can be AV conduction affected by hypokalemia?arrow_forwardThe left AV valve has only two large leaflets, while the right AV valve has three smaller leaflets. It is a general principle of physiology that structure is a determinant of—and has coevolved with—function. Although it is unknown why the two valves differ in structure in this way, what difference in the functional demands of the left side of the heart might explain why there is one less valve leaflet than on the right side?arrow_forwardWhat prevents the AV valves from swinging into the atria?arrow_forward
- Explain the term isovolumetric ventricular contraction?arrow_forwardWhat roles do the chordae tendineae and papillary muscles have in the normal function of the AV valves?arrow_forwardDuring isovolumetric ventricular contraction: a) all valves are open and pressure within the ventricles decreases. b) all valves are open and pressure within the ventricles increases. c) all valves are closed and pressure within the ventricles decreases. d) all valves are closed and pressure within the ventricles increases.arrow_forward
- Why is it important that the AV node delay the electricalimpulse moving from the SA node and the atria to theventricles?arrow_forwardWhat action potential of myocardial cells know the function of each channel and the process?arrow_forwarda) Define a J unctional Tachycardia. b) What is happening to the cells in the AV junction that leads to a Junctional Tachycardia?arrow_forward
- The effective-refractory period present during Phase 2 of the actionpotential of ventricular myocytes:A)is relatively long because the Na+ current does not inactivate. B) is relatively long because K+ current is immediately activated once membrane potential becomes positive. C) prevents tetanus in the heart. D) is about twice as long as in skeletal musclearrow_forwardWhat would be the drawback of cardiac contractions being the same duration as skeletal muscle contractions?arrow_forwardWhat pressure difference between the ventricle and the atrium causes theatrioventricular valve to close?arrow_forward
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