Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 8, Problem 4TY
Summary Introduction
Introduction:
Venous return refers to the rate of the flow of the blood back into the heart. This normally limits the output of the cardiac cycle. There are many mechanisms by which the venous blood returns to the heart and one of the example can be respiratory pump mechanism. It is basically responsible for the return of the venous blood into the heart.
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Chapter 8 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 8 -
1. Who do you want to help you decide which...Ch. 8 - Do you think cost-effectiveness should be a part...Ch. 8 -
1. Why is it so important that the heart always...Ch. 8 - Compare and contrast the structures and functions...Ch. 8 - Prob. 3CRCh. 8 - Describe the function of the heart valves.Ch. 8 - Compare the functions of the pulmonary circuit and...Ch. 8 -
6. Describe the cardiac cycle of relaxation and...Ch. 8 - Describe the function of the SA and AV nodes as...Ch. 8 - Prob. 8CR
Ch. 8 - Prob. 9CRCh. 8 - Prob. 10CRCh. 8 -
1. _______ carry blood away from the heart and...Ch. 8 - Prob. 2TYCh. 8 - Which of the choices represents the order of...Ch. 8 - Prob. 4TYCh. 8 - Prob. 5TYCh. 8 - Prob. 6TYCh. 8 - Prob. 7TYCh. 8 - A pacemaker is used to correct: a. coronary artery...Ch. 8 - Prob. 9TYCh. 8 - Prob. 10TYCh. 8 - Prob. 11TYCh. 8 - Prob. 12TYCh. 8 - Prob. 13TYCh. 8 - Prob. 14TYCh. 8 - Prob. 15TYCh. 8 - Prob. 1AWKCh. 8 - When a coronary artery bypass graft (CABG) is...Ch. 8 - Soldiers have to stand in formation at full...Ch. 8 - Prob. 4AWKCh. 8 - Prob. 5AWKCh. 8 - Ventricular fibrillation is a potentially fatal...Ch. 8 - Prob. 7AWKCh. 8 - Last night, you and your roommate were sound...
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- Which of the following is correct regarding the flow of blood in reference to the left side of the heart? a. Blood flows from the left atrium, through the bicuspid valve, into the left ventricle, through the aortic semilunar valve, and then into the aortic arch b. Blood flows from the left atrium, through the aortic semilunar valve, into the left ventricle, through the bicuspid valve, and then into the aortic arch c. Blood flows from the left atrium, through the bicuspid valve, into the left ventricle, into the aortic arch, through the aortic semilunar valve, and then into systemic arterial systemarrow_forwardWhich of the following is/are true concerning the opening and closing of the cardiac valves? A. valves operate according to the pressures on either side of the valve B. valve operation is constantly being controlled by the medulla oblongata C. valve operation is determined directly by the cardiac action potential (electrical currents control the opening and closing of the valves.) D. valve operation is directly controlled by the papillary muscles within the ventricular wall. E. None of the above is correct.arrow_forwardThe blood vessels responsible for variably distributing cardiac output among organs in the body are: a. Veins b. Arteries c. Capillaries d. Arteriolesarrow_forward
- Which of the following is true about the pacemaker potential in the heart? a. Decreased K+ efflux causes the resting membrane potential to increase b. Action potential occurs when T-type Ca2+ channels open c. Only the SA node in the heart has a pacemaker potential d. The atrioventricular node is needed to pace the sinoatrial node e. None of the options are truearrow_forwardIdentify the correct sequence of blood flow through the chambers of the heart. A "left ventricle, left atrium, lungs, right ventricle, right atrium" B "right ventricle, left ventricle, left atrium, lungs, right atrium" C "right atrium, right ventricle, lungs, left atrium, left ventricle" D "lungs, right ventricle, left ventricle, right atrium, left atrium" E "left ventricle, left atrium, right ventricle, right atrium, lungs"arrow_forwardWhich of the following is NOT a population of pacemaker cells in the heart? a. papillary muscles b. sinoatrial (SA) node c. atrioventricular (AV) node d. Purkinje fiber systemarrow_forward
- Cardiac output is determined by: A. Return of blood to the heart and the heart rate B. Strength of contraction of the left ventricle C. Stroke volume and heart rate D. Systolic discharge and stroke volumearrow_forwardIn the given table, three of the anatomical and physiological terms are similar or related; one does not belong with the other three. Choose the term that does NOT belong in each of the following groups. A B C D 1 Pulmonary Trunk Vena Cava Right Side of the Heart Left Side of the Heart 2 QRS Wave T Wave P Wave Electrical Activity of the Ventricles 3 AV Valves Closed AV Valves Opened Ventricular Systole Semilunar Valves Open 4 Tricuspid Valve Mitral Valve Bicuspid Valve Left AV Valve 5 Pulmonary Valve Umbilical Artery Pulmonary Vein Superior Vena Cavaarrow_forwardWhich of the following statements about the heart is TRUE? A) The sinoatrial node generates the fastest action potentials in the heart B) The parasympathetic branch of the nervous system decreases heart rate C) The sinoatrial node passes the action potentials to the AV node D) Both B & C E) All of the abovearrow_forward
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