Ch 19 heart test p1

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Author:
eddardofwinter
ID:
271548
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Ch 19 heart test p1
Updated:
2014-04-22 20:23:28
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  1. Normal heart sounds are caused by which of the following events?
    A) closure of the heart valves
    B) excitation of the SA node
    C) opening and closing of the heart valves
    D) friction of blood against the chamber walls
    A) closure of the heart valves
    (this multiple choice question has been scrambled)
  2. Which of the events below does not occur when the semilunar valves are open?
    A) Ventricles are in diastole.
    B) Ventricles are in systole.
    C) AV valves are closed.
    D) Blood enters pulmonary arteries and the aorta.
    A) Ventricles are in diastole.
    (this multiple choice question has been scrambled)
  3. Hemorrhage with a large loss of blood causes ________.
    A) a lowering of blood pressure due to change in cardiac output
    B) no change in blood pressure but a change in respiration
    C) no change in blood pressure but a slower heart rate
    D) a rise in blood pressure due to change in cardiac output
    A) a lowering of blood pressure due to change in cardiac output
    (this multiple choice question has been scrambled)
  4. The left ventricular wall of the heart is thicker than the right wall in order to ________.
    A) expand the thoracic cage during diastole
    B) accommodate a greater volume of blood
    C) pump blood through a smaller valve
    D) pump blood with greater pressure
    D) pump blood with greater pressure
    (this multiple choice question has been scrambled)
  5. Damage to the ________ is referred to as heart block.
    A) SA node
    B) AV bundle
    C) AV node
    D) AV valves
    C) AV node
    (this multiple choice question has been scrambled)
  6. The P wave of a normal electrocardiogram indicates ________.
    A) atrial depolarization
    B) ventricular depolarization
    C) atrial repolarization
    D) ventricular repolarization
    A) atrial depolarization
    (this multiple choice question has been scrambled)
  7. Blood within the pulmonary veins returns to the ________.
    A) left atrium
    B) right atrium
    C) right ventricle
    D) left ventricle
    A) left atrium
    (this multiple choice question has been scrambled)
  8. Small muscle masses attached to the chordae tendineae are the ________.
    A) papillary muscles
    B) pectinate muscles
    C) trabeculae carneae
    D) venae cavae
    A) papillary muscles
    (this multiple choice question has been scrambled)
  9. The term for pain associated with deficient blood delivery to the heart that may be caused by the transient spasm of coronary arteries is ________.
    A) myocardial infarct
    B) ischemia
    C) pericarditis
    D) angina pectoris
    D) angina pectoris
    (this multiple choice question has been scrambled)
  10. To auscultate the aortic semilunar valve, you would place your stethoscope in the ________.
    A) fifth right intercostal space
    B) second intercostal space to the right of the sternum
    C) fifth intercostal space inferior to the left nipple
    D) second intercostal space to the left of the sternum
    B) second intercostal space to the right of the sternum
    (this multiple choice question has been scrambled)
  11. The source of blood carried to capillaries in the myocardium would be the ________.
    A) coronary arteries
    B) coronary sinus
    C) fossa ovalis
    D) coronary veins
    A) coronary arteries
    (this multiple choice question has been scrambled)
  12. The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it ________.
    A) pumps a greater volume of blood
    B) sends blood through a smaller valve
    C) expands the thoracic cage
    D) pumps blood against a greater resistance
    D) pumps blood against a greater resistance
    (this multiple choice question has been scrambled)
  13. Which of the following factors does not influence heart rate?
    A) skin color
    B) body temperature
    C) gender
    D) age
    A) skin color
    (this multiple choice question has been scrambled)
  14. Which of the following is not an age-related change affecting the heart?
    A) fibrosis of cardiac muscle
    B) thinning of the valve flaps
    C) atherosclerosis
    D) decline in cardiac reserve
    B) thinning of the valve flaps
    (this multiple choice question has been scrambled)
  15. If cardiac muscle is deprived of its normal blood supply, damage would primarily result from ________.
    A) a decrease in the number of available mitochondria for energy production
    B) a lack of nutrients to feed into metabolic pathways
    C) decreased delivery of oxygen
    D) an inadequate supply of lactic acid
    C) decreased delivery of oxygen
    (this multiple choice question has been scrambled)
  16. If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells ________.
    A) it would be less than 1-2 ms
    B) it would be much longer before cardiac cells could respond to a second stimulation
    C) tetanic contractions might occur, which would stop the heart's pumping action
    D) contractions would last as long as the refractory period
    C) tetanic contractions might occur, which would stop the heart's pumping action
    (this multiple choice question has been scrambled)
  17. Norepinephrine acts on the heart by ________.
    A) causing threshold to be reached more quickly
    B) blocking the action of calcium
    C) causing a decrease in stroke volume
    D) decreasing heart contractility
    A) causing threshold to be reached more quickly
    (this multiple choice question has been scrambled)
  18. If the vagal nerves to the heart were cut, the result would be that ________.
    A) the heart rate would increase by about 25 beats per minute
    B) the AV node would become the pacemaker of the heart
    C) parasympathetic stimulation would increase, causing a decrease in heart rate
    D) the heart would stop, since the vagal nerves trigger the heart to contract
    A) the heart rate would increase by about 25 beats per minute
    (this multiple choice question has been scrambled)
  19. Foramen ovale ________.
    A) connects the two atria in the fetal heart
    B) is a connection between the pulmonary trunk and the aorta in the fetus
    C) is a condition in which the heart valves do not completely close
    D) is a shallow depression in the interventricular septum
    A) connects the two atria in the fetal heart
    (this multiple choice question has been scrambled)
  20. Which vessel of the heart receives blood during right ventricular systole?
    A) pulmonary trunk
    B) aorta
    C) venae cavae
    D) pulmonary veins
    A) pulmonary trunk
    (this multiple choice question has been scrambled)

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