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Medical Mcqs

2nd heart sound is characterized by all except______________?

  • (A)  Due to closure of semilunar valves
  • (B)  Is occasionally split
  • (C)  Has longer duration than 1st heart sound
  • (D)  Marks the onset of diastole
Submitted By :Ali Uppal


Stimulation of baroreceptors results in_______________?

  • (A)  Increase in heart rate
  • (B)  Decreased vagal discharge
  • (C)  Increased sympathetic discharge
  • (D)  Decrease in blood pressure
Submitted By :Ali Uppal


Pain is conducted by________________?

  • (A)  A-alpha fibers
  • (B)  A-beta fibers
  • (C)  A-gamma fibers
  • (D)  A-delta fibers
Submitted By :Ali Uppal


Cardiac output is a measure of______________?

  • (A)  Peripheral resistance X tissue fluid
  • (B)  Peripheral resistance X cardiac rate
  • (C)  Blood pressure X cardiac rate
  • (D)  Heart rate X blood volume
Submitted By :Ali Uppal


The largest function of the total peripheral resistance is due to _________________?

  • (A)  Venules
  • (B)  Arterioles
  • (C)  Capillaries
  • (D)  Precapillary sphincters
Submitted By :Ali Uppal


Minimum blood pressure is in_____________?

  • (A)  Aorta
  • (B)  Arteries
  • (C)  Capillaries
  • (D)  Venules
Submitted By :Ali Uppal


Consider the following statements________________?

  • (A)  Starling’s law of heart states that increase in force of contraction is directly related to cardiac ouput
  • (B)  Staling’s law of heart states that the force of ventricular contraction is directly related to the end diastolic volume
  • (C)  Both A and B
  • (D)  None of the above
Submitted By :Ali Uppal


Cardiac index is related to ______________?

  • (A)  cardiac output and body weight
  • (B)  Cardiac output and body surface area
  • (C)  Cardiac output and work of the heart
  • (D)  Stroke volume and pulse rate
Submitted By :Ali Uppal


Closure of aortic valve occurs before the following event_______________?

  • (A)  Isovolumetric contraction
  • (B)  Isovolumetric relaxation
  • (C)  Pre-diastole
  • (D)  Pre-systole
Submitted By :Ali Uppal


Fastest conducting tissue in human heart _________________?

  • (A)  AV node
  • (B)  SA node
  • (C)  Bundle of His
  • (D)  Purkinje fibers
Submitted By :Ali Uppal