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Chapter 12

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  • Which of the following supplies blood to the muscle tissue of the heart?

    great cardiac veins

    aorta

    coronary arteries

    coronary sinuses

    Coronary arteries

  • The heart is surrounded by the

    pericardial cavity.

    peritoneal cavity.

    pleural cavity.

    cardiac skeleton.

    coronary sinus.

    Pericardial cavity

  • Each cardiac muscle cell is bound to its neighboring cells at sites called ________.

    trabeculae

    fossa ovalis

    intercalated discs

    myofibrils

    sarcomeres

    Intercalated discs

  • The muscle layer of the heart is the ________.

    endocardium

    epicardium

    myocardium

    endothelium

    visceral pericardium

    Myocardium

  • The first heart sound ("lubb") is produced as the atrioventricular valves ________ and the semilunar valves ________.

    close; close

    open; close

    open; open

    close; open

    The actions of the valves do not contribute to the heart sounds.

    Close, Open

  • The amount of blood ejected by a ventricle during a single beat is called the

    stroke volume.

    cardiac output.

    end diastolic volume.

    heart rate.

    end systolic volume.

    Stroke volume

  • What is the function of the cardiovascular system?

    transports cells and dissolved materials, including nutrients, wastes, oxygen, and carbon dioxide

  • What is the name of the cranial nerve that innervates visceral organs in the thoracic and abdominopelvic cavities with both sensory and motor fibers?

    glossopharyngeal

    hypoglossal

    vagus

    accessory

    Vagus

  • What are the systems of the efferent division?

    Somatic nervous system and autonomic nervous system

  • What ion is involved in hyperkalemia and hypokalemia?

    sodium

    chlorine

    potassium

    calcium

    Potassium (K+)

  • Where is the mitral valve found?

    between the right atria and right ventricle

    at the juncture of the pulmonary trunk and right ventricle

    between the left atria and left ventricle

    at the juncture of the aorta and left ventricle

    between the left atria and left ventricle