Competitive Exams: Medical Science MCQs (Practice-Test 119 of 135)

  1. The primary function of basal ganglia is:

    1. Sensory integration

    2. Short-term memory

    3. Preprogramming of voluntary activity

    4. Control of equilibrium

  2. The principal estrogen found in the urine of pregnant women is

    1. Estriol

    2. Estrone

    3. Beta-estradiol

    4. Pregnanediol

  3. During cardiac cycle, the rate of increase in intraventricular pressure is the maximum in

    1. rapid ejection

    2. rapid filling of ventricle

    3. isometric contraction

    4. reduced ejection

  4. Consider the following statements: The ECG record does not show the repolarization of auricle because it is hidden by the

    1. repolarization of ventricles.

    2. depolarization of auricles.

    3. depolarization of ventricles

    4. inter-atrial septal depolarization

    Of these statements

    1. 1, 2 and 4 are correct

    2. 1 and 4 are correct

    3. 2 and 3 are correct

    4. 3 alone is correct

  5. What is the correct sequence of the following events that lead to regulation of blood volume by the kidney when the blood volume is raised?

    1. Increase in GFR and urine output.

    2. Increase in arterial blood pressure.

    3. Increase in cardiac output.

    4. Decrease in blood volume

    Select the-correct answer using the codes given below:

    1. 3, 1, 2, 4

    2. 1, 3, 2, 4

    3. 3, 2, 1, 4

    4. 1, 2, 3, 4

  6. In the tissues, the pCO2 remains normally

    1. of the order of 50mm Hg

    2. of the order of 40 mm Hg

    3. of the order of 100 mm Hg

    4. above 100 mm Hg

  7. Respiratory alkalosis may be produced by

    1. chronic obstructive pulmonary disease

    2. drugs causing respiratory depression

    3. hyperpnoea

    4. excessive renal bicarbonate absorption

  8. Match List-I (Tubular function) with List-II (Substance) and select the correct answer

    List-I List-II
    1. Active reabsorption

    2. Passive diffusion

    3. Secretion

    4. Neither reabsorption nor secretion

    1. Urea

    2. Phenoled

    3. Glucose

    4. Insulin

    • A
    • B
    • C
    • D
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 4
      • 2
      • 3
      • 1
      • 2
      • 4
      • 1
      • 3
      • 2
      • 4
  9. Countercurrent mechanism of the kidney consists of

    1. Proximal tubule and collecting tubule

    2. loop of Henle and vase recta

    3. collecting tubule and vase recta

    4. proximal tubule and loop of Henle

  10. Which one of the following statements regarding oxygenation and deoxygenation of haemoglobin (Hb) is correct?

    1. Oxygenated Hb is a stronger acid when compared to deoxygenated Hb

    2. Deoxygenated Hb is a stronger acid when compared to oxygenated Hb

    3. The acidic characters of the oxygenated Hb and deoxygenated Hb are of the same magnitude

    4. Since Hb is present inside the erythrocytes, its oxygenation or deoxygenation does not alter the acidic or basic character

  11. Consider the following statements: Complete compensation for acid-base disturbances within a short time is characteristic of regulation by

    1. chemical buffers.

    2. respiratory regulatory system.

    3. renal regulatory system.

    Of these statements

    1. 1, 2 and 3 are correct

    2. 2 and 3 are correct

    3. 3 alone is correct

    4. 1 alone is correct

  12. Consider the following statements: Triglycerides are resynthesized in the intestinal epithelium from

    1. 2-monoacyl glycerols.

    2. 3-monoacyl glycerols.

    3. 1-monoacyl glycerols

    Of these statements

    1. 1, 2 and 3 are correct

    2. 1 and 3 are correct

    3. 1 and 2 are correct

    4. 2 and 3 are correct

  13. Intravenous glucose tolerance test is advisable in patients (GIT = gastrointestinal tract)

    1. of diabetes mellitus having normal GIT

    2. having defective absorption from GIT

    3. of hyperthyroidism

    4. of diabetes insipidus having normal

    GIT

  14. Consider the following statements: Substrate level phosphosylation is catalysed by

    1. Phosphoglycerate kinase.

    2. Pyruvate kinase.

    3. Succinate thiokinase.

    4. succinate dehydrogena

    Of these statements

    1. 2, 3 and 4 are correct

    2. 1, 2 and 3 are correct

    3. 1, 2 and 4 are correct

    4. 1, 3 and 4 are correct

  15. The melting temperature (Tm) of DNA is related to the

    1. Length of the two strands of DNA

    2. type of the double helix present in DNA

    3. base composition of DNA

    4. diameter of the double helix of DNA