EBK HUMAN ANATOMY
9th Edition
ISBN: 9780134424828
Author: Nath
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 21, Problem 5RC
Summary Introduction
To review:
The reason for the absence of the muscular braces in the aortic and pulmonary valves.
Introduction:
The human heart has four valves present, namely aortic valve, pulmonary valve, tricuspid valve, and mitral valve. The mitral valve and tricuspid valve are atrioventricular (AV) valves.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Why are the tendinous cords required for the proper functioning of the AV valves?
What pressure difference between the ventricle and the atrium causes theatrioventricular valve to close?
What is the inherent rate of automaticity at the AV junction?
Chapter 21 Solutions
EBK HUMAN ANATOMY
Ch. 21 - Match each numbered item with the most closely...Ch. 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 - The potential space between the parietal and...Ch. 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 - Prob. 10RCCh. 21 - Prob. 1CTCh. 21 - 2. Lee is brought to the emergency room suffering...Ch. 21 - Prob. 3CT
Knowledge Booster
Learn more about
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
- Why do implantable defibrillators require far less power on their own than a pacemaker?arrow_forwardWhat 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_forward
- During 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_forwardWhat anatomic features slow the conduction rate of the action potential as it passes through the AV node? What is the function of this delay?arrow_forwardWhat exactly are av valves? What happens in the heart that causes them to open and close?arrow_forward
- What anatomical feature prevents the electrical signal from traveling directly from atrial muscle to ventricular muscle?arrow_forwardWhat valve is located between the left atrium and left ventricle? a-Tricuspid valve b-Bicuspid valve c-Pulmonary valve d-Aortic valvearrow_forwardDuring the cardiac cycle, when would you expect to hear the second heart sound? a) After ejection of blood into the aorta O b) Between the P wave and the QRS complex O C) When the AV valves close O d) When the AV valves are openarrow_forward
- Under the microscope, I can see a section through one of the chambers of the heart. The myocardium is thick and the endocardium is very thin. In addition, I can see a valve that connects this chamber to the next which has two cusps that prevent backflow from one chamber into another 4. Where in the heart am 1? What does the thickness of the myocardium tell you about this region of the heart? What is the valve called? What does it do? What other valve would you see in this area of the heart? Where is it situated?arrow_forwardWhy is it important that the AV node delay the electricalimpulse moving from the SA node and the atria to theventricles?arrow_forwardWhy do the coronary arteries carry a greater blood flow during ventricular relaxation than they do during ventricular contraction?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage LearningSurgical Tech For Surgical Tech Pos CareHealth & NutritionISBN:9781337648868Author:AssociationPublisher:Cengage
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
Surgical Tech For Surgical Tech Pos Care
Health & Nutrition
ISBN:9781337648868
Author:Association
Publisher:Cengage
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License