Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 44, Problem 3TYU
Summary Introduction

Introduction: The heart is the main organ of the circulatory system that transports the blood to all parts of the body. The repetitive cycle of contraction and relaxation of the heart is termed as the cardiac cycle. The complete cycle of one heartbeat forms a cardiac cycle. The cardiac cycle is represented as “number of heartbeats in one minute”.

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the cardiac cycle (More than one answer may be correct. Choose all that apply) a.) stroke volumes are around 70 – 80 ml b.) ventricular volumes are at a minimum at the beginning of diastole c.) ventricular volumes are at a minimum at the end of isovolumetric contraction d.) ventricular volumes are at a minimum just prior to atrial systole e.) ventricular volumes are at a minimum when both atrioventricular and semilunar valves are closed
Increased contractility of the heart results in all of the following EXCEPT (A) increased stroke volume (B) increased force of contraction (C) increased end-systolic volume (D) increased venous return
The structure marked by the white arrow (A) is found between the right and left ventricles (B) is found between the right and left atria (C) closes before birth (D) A and C (E) B and C
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