Physiology Solved Objective Questions – Part 2

Q.1. what is not true regarding carbohydrate in body.

  1. Liver stores about 100gm of glycogen

  2. Muscles store about 400gm of glycogen

  3. Small intestine has the capacity to absorb approximately 5kg of carbohydrate in 24 hr.

  4. Plasma glucose level is 50-60mg/dl higher an arterial sidle as compare to level on venous side

Answer: D

Reference: understanding medical physiology by R.L.Bijalani

The maximum capacity of small intestine to absorb carbohydrate is 5kg is mentioned in book rest of the back are very obvious.

Q.2. A 72 year old lady was admitted in hospital with the history of repeated brief episodes of loss of conxiousness?

  1. Ventricular tachycardia

  2. Heart block

  3. Diabebc coma

  4. Hypersensitivity of carotid sinus

Answer: C

Reference: Cardiovaxular physiology by Robert M Berhe and Matthew N Levy.

Diabetic coma is not characterized by repeated episodes of unconsciousness.

Q.3. Choose the correct answer about hapten:-

  1. Is a protein recreated from liver and if helps in erythropoiesis.

  2. Is a form of vit A stored in liver.

  3. If combiner with a substance that is antigenic it can simulate immune mechanism

  4. All of the above

Answer: C

Reference: Text look of medical physiology by Guyton and Hall

Hapten is a low molecular weight compound, when if combines with a substance which is antigenic such as protein that this combination stimulates immune system to born antibodies, These antibodies react to the hapten as well to the protein.

Q.4. which of the following statements about the effect of icons on vessels is not correct:

  1. Increase in potassium ion concentration causes vasodilatation

  2. Increase in hydrogen ion concentration causes vasoconstriction

  3. Increase in calcium ion concentration causes vasoconstriction

  4. Increase in magnesium ion concentration causes vasodilatation

Answer: B

Reference: premanual for under graduates physiology by- Vijay D Joshi

Both potanium and magnesium causes vasodilatation by inhibition of smooth muscles of vessels. Calcium ions simulate smooth muscles by making their contraction stronger hydrogen ion changes the pH and results into vasodilatation.

Q.5. The calcium channel antagonist such as nibedipine shows which of the following effects:

  1. Inhibits conduction of cardiac impune through myocardial fibres

  2. Inhibits conduction of impune through nodal bibres

  3. Increase conduction of impune through myocardial fibres

  4. Increase conduction of impune through nodal bibres

Answer: B

Reference: Understanding medical physiology by R.L.Bijlani

Depolarization of nodal tissue depends on calcium level if calcium is for there is reduction in slope of upstroke and amplitude of action potential decreases resulting in decrease in the speed of propogation

Q.6. A longer old school girl was brought to hospital, she became unwell in the hostel room when scolded by warden, she was alert and anxious and also complained of tingling in her hands, on investigation the arterial plasma value were

pH7.53

PCO227mmHg

HCO322.meg/L

What is the correct diagnosis

  1. Acute respiratory diagnosis

  2. Metabolic alkalosis

  3. Respiratory acidosis

  4. Metabolic acidosis

Answer: A

Reference: Review of medical physiology by William F. Ganong

Value are suggestive of respiratory alkalosis as a result of hyperventilation. In alkalosis plasma total calcium level does not change but Ca++ level balls and that is the cause of tingling sensation