Chapter 15 Study Guide: The Heart Size and Location
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Questions and Answers

Where is the heart located in the body?

  • In the abdominal cavity
  • Above the sternum
  • Between the lungs
  • In the mediastinum (correct)

    • Which part of the heart is known as the Point of Maximum Impulse?

  • Left ventricle
  • Apex (correct)
  • Fibrous pericardium
  • Base

    • Which layer of the heart wall is composed of cardiac muscle and performs the work of the heart?

  • Pericardial sac
  • Endocardium
  • Myocardium (correct)
  • Epicardium

    • How many chambers does the heart have?

    <p>Four (B)</p> Signup and view all the answers

    What is the basic role of the left ventricle in the heart?

    <p>Pumping blood throughout the body (C)</p> Signup and view all the answers

    Which layer of the pericardial sac surrounds the heart and forms a cavity between its two layers?

    <p>Serous pericardium (C)</p> Signup and view all the answers

    What is the name of the valve that connects the left atrium and left ventricle?

    <p>Mitral Valve (Bicuspid Valve/Left AV Valve) (C)</p> Signup and view all the answers

    Which valve prevents backflow from the aorta into the left ventricle?

    <p>Aortic Valve (D)</p> Signup and view all the answers

    What is the function of the skeleton of the heart?

    <p>To keep the valves from stretching (B)</p> Signup and view all the answers

    Where does deoxygenated blood enter the heart?

    <p>Superior Vena Cava (C)</p> Signup and view all the answers

    Which coronary artery nourishes most of the right ventricle?

    <p>Right Coronary Artery (RCA) (D)</p> Signup and view all the answers

    When do coronary arteries receive their supply of blood?

    <p>When the ventricles relax (A)</p> Signup and view all the answers

    What is the structure of cardiac muscle like?

    <p>Short, fat, and branched (B)</p> Signup and view all the answers

    Where is coronary circulation different from circulation in the rest of the body?

    <p>In arterial compression during myocardial contraction (D)</p> Signup and view all the answers

    What is unique about the electrical characteristics of cardiac muscle?

    <p>They are only found in the heart, short, fat, and branched in structure (A)</p> Signup and view all the answers

    What is the purpose of the Tricuspid valve?

    <p>Connects the right atrium and right ventricle (D)</p> Signup and view all the answers

    What is the function of the tricuspid valve in the heart?

    <p>Prevents backflow from the right ventricle to the right atrium (A)</p> Signup and view all the answers

    What is the main function of the skeleton of the heart?

    <p>To keep the valves from stretching (B)</p> Signup and view all the answers

    Where does deoxygenated blood return to the heart?

    <p>Via the Superior Vena Cava (B)</p> Signup and view all the answers

    Which part of the myocardium is nourished by the Right Coronary Artery (RCA)?

    <p>Inferior part of left ventricle (B)</p> Signup and view all the answers

    When does coronary circulation primarily occur?

    <p>During myocardial contraction (C)</p> Signup and view all the answers

    What is the unique characteristic of cardiac muscle?

    <p>Short, fat, and branched (D)</p> Signup and view all the answers

    What is the function of the mitral valve in the heart?

    <p>Connects the left atrium and left ventricle (D)</p> Signup and view all the answers

    What part of the heart does the Aortic Valve (Left Semilunar Valve) prevent backflow into?

    <p>Left Ventricle (B)</p> Signup and view all the answers

    Which part of the heart does the Pulmonary Valve (Right Semilunar Valve) prevent backflow into?

    <p>Right Ventricle (A)</p> Signup and view all the answers

    What is the main function of cardiac muscle?

    <p>To contract and pump blood throughout the circulatory system (A)</p> Signup and view all the answers

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