Ch 19 Heart test B

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  1. Atrial systole begins
    A. immediately after the P wave.
    B. immediately after the T wave.
    C. immediately before the P wave.
    D. during the S-T segment.
    E. during the Q wave.
    A. immediately after the P wave.
    (this multiple choice question has been scrambled)
  2. Atrial depolarization causes
    A. the T wave.
    B. the QRS complex.
    C. the quiescent period.
    D. the P wave.
    E. the first heart sound.
    D. the P wave.
    (this multiple choice question has been scrambled)
  3. The long plateau in the action potential observed in cardiocytes is probably related with _____________ staying longer in their cytosol.
    A. Na+
    B. Cl-
    C. Na+, K+, and Ca2+
    D. K+
    E. Ca2+
    E. Ca2+
    (this multiple choice question has been scrambled)
  4. When the left ventricle contracts, the _____ valve closes and the _____ valve is pushed open.
    A. aortic; pulmonary
    B. tricuspid; pulmonary
    C. mitral; aortic
    D. bicuspid; pulmonary
    E. tricuspid; aortic
    C. mitral; aortic
    (this multiple choice question has been scrambled)
  5. Mitral valve stenosis causes blood to leak back into the ___________ when the ventricles contract.
    A. aorta
    B. pulmonary trunk
    C. pulmonary arteries
    D. right atrium
    E. left atrium
    E. left atrium
    (this multiple choice question has been scrambled)
  6. Isovolumetric contraction occurs during the _________ of the electrocardiogram.
    A. P-Q segment
    B. P wave
    C. S-T segment
    D. R wave
    E. T wave
    D. R wave
    (this multiple choice question has been scrambled)
  7. During isovolumetric contraction, the pressure in the ventricles
    A. falls and then rises.
    B. remains constant.
    C. rises rapidly.
    D. falls rapidly.
    E. rises and then falls.
    C. rises rapidly.
    (this multiple choice question has been scrambled)
  8. Mitral valve prolapse (MVP) generates a murmur associated with the _____ heart sound that occurs when the ____.
    A. dupp (S2); atria relax
    B. lubb (S1); atria contract
    C. lubb (S1); ventricles contract
    D. lubb (S1); ventricles relax
    E. dupp (S2); ventricles relax
    C. lubb (S1); ventricles contract
    (this multiple choice question has been scrambled)
  9. This is the correct sequence of events of the cardiac cycle.
    A. ventricular filling → isovolumetric contraction → ventricular ejection → isovolumetric relaxation
    B. ventricular filling → isovolumetric relaxation → ventricular ejection → isovolumetric contraction
    C. ventricular filling → isovolumetric contraction → isovolumetric relaxation → ventricular ejection
    D. ventricular filling → ventricular ejection → isovolumetric contraction → isovolumetric relaxation
    E. ventricular filling → isovolumetric relaxation → isovolumetric contraction → ventricular ejection
    A. ventricular filling → isovolumetric contraction → ventricular ejection → isovolumetric relaxation
    (this multiple choice question has been scrambled)
  10. Most of the ventricle filling occurs
    A. during atrial systole.
    B. during isovolumetric contraction.
    C. during ventricular systole.
    D. during atrial diastole.
    E. when the AV valve is closed.
    D. during atrial diastole.
    (this multiple choice question has been scrambled)
  11. Congestive heart failure (CHF) of the right ventricle
    A. can cause systemic edema.
    B. can cause pulmonary edema.
    C. increases cardiac output in both ventricles.
    D. increases the ejection fraction of the right ventricle.
    E. reduces the ejection fraction of the left ventricle.
    A. can cause systemic edema.
    (this multiple choice question has been scrambled)
  12. Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV and HR are
    A. SV=150 mL/beat, HR=16 bpm.
    B. SV=40 mL/beat, HR=60 bpm.
    C. SV=30 mL/beat, HR=80 bpm.
    D. SV=80 mL/beat, HR=30 bpm.
    E. SV=16 mL/beat, HR=150 bpm.
    C. SV=30 mL/beat, HR=80 bpm.
    (this multiple choice question has been scrambled)
  13. _____________ increase(s) stroke volume.
    A. Increased venous return
    B. High arterial blood pressure
    C. Negative inotropic agents
    D. Increased afterload
    E . Dehydration
    A. Increased venous return
    (this multiple choice question has been scrambled)
  14. The volume of blood ejected by each ventricle in one minute is called
    A. the stroke volume.
    B. the afterload.
    C. the cardiac reserve.
    D. the cardiac output.
    E. the preload.
    D. the cardiac output.
    (this multiple choice question has been scrambled)
  15. Cardioinhibitory centers in the _____________ receive input from __________.
    A. hypothalamus; proprioceptors in the joints
    B. cortex; proprioceptors in the muscles
    C. thalamus; chemoreceptors in the medulla oblongata
    D. medulla oblongata; chemoreceptors in the aortic arch
    E. pons; baroreceptors in the internal carotid
    D. medulla oblongata; chemoreceptors in the aortic arch
    (this multiple choice question has been scrambled)
  16. The Frank-Starling law of the heart states that stroke volume is proportional to
    A. the end-diastolic volume.
    B. the end-systolic volume.
    C. the heart rate.
    D. contractility.
    E. the afterload.
    A. the end-diastolic volume.
    (this multiple choice question has been scrambled)
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Ch 19 Heart test B
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