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Medical Mcqs

Coronary blood flow is usually predominantly controlled by_____________?

  • (A)  Auto regulation
  • (B)  Hormones
  • (C)  Parasympathetic impulses
  • (D)  Sympathetic impulse
Submitted By :Ali Uppal


Cardiac cycle duration in man is_______________?

  • (A)  0.4 seconds
  • (B)  0.8 seconds
  • (C)  1.2 seconds
  • (D)  1.6 seconds
Submitted By :Ali Uppal


The following factors increase the cardiac output except______________?

  • (A)  Preload
  • (B)  After load
  • (C)  Heart rate
  • (D)  Myocardial contractility
Submitted By :Ali Uppal


In determining blood pressure by auscultatory method_____________?

  • (A)  The loudest sound is the diastolic pressure
  • (B)  Systolic pressure estimation tends to be lower than those make by palpatory method
  • (C)  The first sound heard is the systolic pressure
  • (D)  The sounds that are heard are generated in heart
Submitted By :Ali Uppal


Glomerular capillary pressure differ from other capillaries of body in______________?

  • (A)  Higher filtration pressure
  • (B)  Lower filtration pressure
  • (C)  Both of the above
  • (D)  None
Submitted By :Ali Uppal


Which of the following increases turbulence in blood flow ?

  • (A)  Reynolds number < 2000
  • (B)  Decrease in velocity of blood
  • (C)  Decrease in density of blood
  • (D)  Increase in diameter of blood vessel
Submitted By :Ali Uppal


The velocity of conduction in the Purkinjie fibers of the heart is__________________?

  • (A)  1 to 4 m/sec
  • (B)  5 to 8 m/sec
  • (C)  9 to 12 m/sec
  • (D)  More than 12 m/sec
Submitted By :Ali Uppal


What is common between systemic and pulmonary circulation is_____________?

  • (A)  Volume of the circulation per minute
  • (B)  Peripheral vascular resistance
  • (C)  Pulse Pressure
  • (D)  Total Capacity
Submitted By :Ali Uppal


The function of Carotid body is_______________?

  • (A)  Measures the change in Po2 in arterial blood
  • (B)  Measures Po2 in venous blood
  • (C)  Measures the changed in CO2 in arterial blood
  • (D)  Measures the change in CO2 in venous blood
Submitted By :Ali Uppal


The dicrotic notch on the aortic pressure curve is caused by_________________?

  • (A)  Closure of the pulmonary valve
  • (B)  Rapid filling of the left ventricle
  • (C)  Closure of the aortic valve
  • (D)  Contraction of the atria
Submitted By :Ali Uppal