PGY 300 UB EXAMPREP QUESTIONS
ANSWERS COMPLETE REVIEW MATERIAL
GUARANTEED PASS
●● Which of the following components of blood has the greatest
volume?
A. Plasma volume
B. Red blood cell volume (hematocrit)
C. White blood cell volume
D. Platelets
E. Hemoglobin
Answer: A
●● Blood flow out of the right ventricle would go to the
_________________________________.
A. aorta to the systemic circulation
B. pulmonary vein to the left atrium
C. vena cava to the right atrium
D. system circulation to the Left atrium
E. pulmonary artery to the lung
Answer: E
,●● An increase in the pressure difference between two points (delta P)
of the circulation would
result in _____________________________ if the resistance is
constant.
A. no change in blood flow in this segment
B. decreased blood flow in this segment
C. increased blood flow in this segment
D. reduced vessel radius
E. increase in vessel radius
Answer: C
●● Which of the specialized conducting cells conducts the signal from
the sinoatrial node to the
atrial ventricular node?
A. Sinoatrial node
B. Internodal pathways
C. Purkinje fibers
D. Atrioventricular bundle (bundle of His)
E. Bundle branches
Answer: D
●● The characteristic of spontaneous excitation (autorythmic or
pacemaker potential) is due to
,function of which of the following channels?
A. Opening Funny channels (If) for sodium (Na+)
B. Opening Calcium channels (Ca2+)
C. Opening Potassium channels (K+)
D. Closing Calcium channels (Ca2+)
E. Closing Potassium channels (K+)
Answer: A
●● The long plateau and refractory period of the cardiac contracting
cells action potentials is a
result of______________________.
A. closing of the Funny channels (If) for sodium (Na+)
B. the Calcium ion channel remaining open for a long period (Ca2+)
C. opening Potassium channels (K+)
D. closing Calcium channels (Ca2+)
E. None of the above answers are correct
Answer: B
●● Which of the waves of the electrocardiogram represent ventricular
repolarization?
A. "P" wave
B. "P" to "Q" interval
C. "QRS wave
, D. "QRS" to "P" wave
E. "T" wave
Answer: E
●● Cardiac muscle cells that contract
have______________________________________.
A. pacemaker potential (autorhythmic) capabilities
B. a plateau phase where Ca++ channels stay open for a long period of
time (Phase 2)
C. a low threshold for excitation during the plateau phase (absolute
refractory period)
D. innervation from the parasympathetic nerves that decrease the
opening of the Ca++ channels
E. All of the above answers are correct
Answer: B
●● Systolic blood pressure is
____________________________________________.
A. a result of ejection of the stroke volume into the aorta
B. proportional to the total peripheral resistance
C. decreased by an increase in sympathetic nerve activity and
norepinephrine
D. the nadir (lowest) arterial blood pressure
E. increased by an increase in parasympathetic nerve activity
ANSWERS COMPLETE REVIEW MATERIAL
GUARANTEED PASS
●● Which of the following components of blood has the greatest
volume?
A. Plasma volume
B. Red blood cell volume (hematocrit)
C. White blood cell volume
D. Platelets
E. Hemoglobin
Answer: A
●● Blood flow out of the right ventricle would go to the
_________________________________.
A. aorta to the systemic circulation
B. pulmonary vein to the left atrium
C. vena cava to the right atrium
D. system circulation to the Left atrium
E. pulmonary artery to the lung
Answer: E
,●● An increase in the pressure difference between two points (delta P)
of the circulation would
result in _____________________________ if the resistance is
constant.
A. no change in blood flow in this segment
B. decreased blood flow in this segment
C. increased blood flow in this segment
D. reduced vessel radius
E. increase in vessel radius
Answer: C
●● Which of the specialized conducting cells conducts the signal from
the sinoatrial node to the
atrial ventricular node?
A. Sinoatrial node
B. Internodal pathways
C. Purkinje fibers
D. Atrioventricular bundle (bundle of His)
E. Bundle branches
Answer: D
●● The characteristic of spontaneous excitation (autorythmic or
pacemaker potential) is due to
,function of which of the following channels?
A. Opening Funny channels (If) for sodium (Na+)
B. Opening Calcium channels (Ca2+)
C. Opening Potassium channels (K+)
D. Closing Calcium channels (Ca2+)
E. Closing Potassium channels (K+)
Answer: A
●● The long plateau and refractory period of the cardiac contracting
cells action potentials is a
result of______________________.
A. closing of the Funny channels (If) for sodium (Na+)
B. the Calcium ion channel remaining open for a long period (Ca2+)
C. opening Potassium channels (K+)
D. closing Calcium channels (Ca2+)
E. None of the above answers are correct
Answer: B
●● Which of the waves of the electrocardiogram represent ventricular
repolarization?
A. "P" wave
B. "P" to "Q" interval
C. "QRS wave
, D. "QRS" to "P" wave
E. "T" wave
Answer: E
●● Cardiac muscle cells that contract
have______________________________________.
A. pacemaker potential (autorhythmic) capabilities
B. a plateau phase where Ca++ channels stay open for a long period of
time (Phase 2)
C. a low threshold for excitation during the plateau phase (absolute
refractory period)
D. innervation from the parasympathetic nerves that decrease the
opening of the Ca++ channels
E. All of the above answers are correct
Answer: B
●● Systolic blood pressure is
____________________________________________.
A. a result of ejection of the stroke volume into the aorta
B. proportional to the total peripheral resistance
C. decreased by an increase in sympathetic nerve activity and
norepinephrine
D. the nadir (lowest) arterial blood pressure
E. increased by an increase in parasympathetic nerve activity
