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Sample - I

Examination Samples


Sample - I


1.  The SA-node potential:

  1. Starts by a rapid depolarization.
  2. Has unstable prepotential (phase 4).                 
  3. Has its firing level at potential of -9mV.
  4. Is characterized by plateau.
  5. Has repolarization phase due to Na+ influx.

2.  Which one of the following substances has –ve inotropic effect:

  1. Digitalis (Digoxin).
  2. Acidosis.                     
  3. Norepinephrine.
  4. Calcium (Ca+2) ions.
  5. Caffieen.

3.  End diastolic volume:

  1. Is the volume of the blood in the ventricle at the end of systole.
  2. Decreases during ventricular diastole.
  3. Is about 110-120 mL.             
  4. Decreases when venous return increases.
  5. Does not affect the stroke volume.

4.  The right ventricular systolic pressure is about:

  1. 120 mmHg.
  2. 80 mmHg.
  3. 25 mmHg.                   
  4. 10 mmHg.
  5. 100 mmHg.

5.  The second heart sound:

  1. Is due to closure of mitral and tricuspid valves.
  2. Is recorded during maximum filling phase.
  3. Is short and sharp as compared to first heart sound.      
  4. Starts with isovolumetric contraction phase.
  5. Coincides with QRS complex of ECG.

6.  During isovolumetric contraction phase:

  1. Ventricular pressure decreases.
  2. The third heart sound is produced.
  3. Ventricular volume decreases.
  4. Blood flows from left ventricle to aorta.
  5. Pulmonary and aortic valves are closed.           

7.  During atrial systole:

  1. The first heart sound is produced.
  2. About 20-30% of ventricular filling occurs.                   
  3. The C-wave of jugular venous pulse is recorded.
  4. The ventricles are contracting.
  5. The AV-valves are closed.

Sample - II


1.        Which of the following hormones is NOT controlled by the Anterior  Pituitary?

a.       Thyroxin.

b.      Parathyroid hormone.

c.       Cortisol.

d.      Testosterone.


2.        All of the following are second messengers EXCEPT:

a.         Calmodulin (Ca++).

b.        cAMP.

c.         Adenyl cyclase.

d.        cGMP.


3.        Acromegally:

a.         Results in hypoglycemia.

b.        Is characterized by increased size of hands and feet.

c.         Appears in children.

d.        Can be caused by hypo-function of the Anterior Pituitary.


4.        Thyroxin:

a.         Is a polypeptide hormone.

b.        Decreases the heart rate.

c.         Increases appetite.

d.        Increases lipogenesis.


5.        Which of the following is NOT a symptom of hypothyroidism?

a.         Intolerance to cold.

b.        Weight gain.

c.         Exophthalmos.

d.        Goiter.


6.        Which of the following does NOT cause growth retardation?

a.         Failure to synthesize somatomedins by the liver.

b.        Deficiency of growth hormone.

c.         Hyperthyroidism.

d.        Hypothyroidism.


7.        In Cretinism all of the following are present EXCEPT:

a.         Increased thyroxin secretion.

b.        Decreased metabolic rate.

c.         Mental retardation.

d.        Growth retardation.


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