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Physiology; Daily Free Online Mock Test 124 (PGI Pattern)

Author: RxPG, Posted on Thursday, October 16 @ 00:00:00 IST by RxPG  

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Multiple Choice Test

1) An acclimatized mountaineer, breathing air on the summit of Mount Everest (barometric pressure 253 Torr), will have an arterial PCO2 (PaCO2) of approximately:

One answer only.
   A. 24 mm Hg.
   B. 20 mm Hg.
   C. 16 mm Hg.
   D. 12 mm Hg.
   E. 8 mm Hg.

2) A patient in an intensive care unit has the following haemodynamic measurements made: Mean Systemic Arterial Pressure (MAP) 80 mm Hg. Mean Central Venous Pressure (CVP) 10 mm Hg. Cardiac Output (CO) 5.0 l/min. Mean Pulmonary Arterial Pressure (MPAP) 35 mm Hg. Pulmonary Artery Occlusion Pressure (PAOP) 20 mm Hg. The pulmonary vascular resistance (PVR) is:

One answer only.
   A. 14 dynes.sec.cm-5.
   B. 120 dynes.sec.cm-5.
   C. 240 dynes.sec.cm-5.
   D. 400 dynes.sec.cm-5.
   E. 1120 dynes.sec.cm-5.

3) In the left lateral position, blood flow to the non-dependant lung is:

One answer only.
   A. 25%.
   B. 35%.
   C. 45%.
   D. 55%.
   E. 65%.

4) What is the rate of rise of PaCO2 during breath holding?

One answer only.
   A. 1 mmHg/min.
   B. 3 mmHg/min.
   C. 5 mmHg/min.
   D. 7 mmHg/min.
   E. 10 mmHg/min.

5) A morbidly obese, non-smoking patient who is otherwise well is likely to have a significant reduction in:

Choose 3 of the following options.
   1. Functional Residual Capacity (FRC).
   2. Forced Expiratory Volume in 1 second (FEV1).
   3. Expiratory Reserve Volume (ERV).
   4. Diffusing Capacity for Carbon Monoxide (DLCO).
   5. FEV2

6) Which of the following are true with respect to increasing oxygen reserves through preoxygenation with 100% oxygen:

One answer only.
   1. It is well reflected by the arterial oxygenation saturation.
   2. It requires longer when using a Bain circuit.
   3. It is achieved equally as well with 4 vital capacity breaths or 3 minutes of tidal volume breathing.
   4. Oxygen reserves are reduced in pregnancy.
   5. CO2 reserves are reduces in pregnancy

7) Which of the following typically result from the application of an aortic cross clamp?

Choose 4 of the following options.
   1. Stroke volume decreases.
   2. Systemic blood pressure increases.
   3. Myocardial contractility decreases.
   4. Venous return decreases.
   5. Venous Return Increases

8) Pulmonary Surfactant:

Choose 4 of the following options.
   1. Is produced by type II alveolar cells.
   2. Is turned over so rapidly that a reduction in pulmonary blood flow can cause a decrease in surfactant production.
   3. Synthesis is stimulated by thyroxine and glucocorticoids.
   4. Is partly recycled by endocytosis into the synthesising cell.
   5. Is fully recycled by endocytosis into the synthesising cell

9) The carotid body chemoreceptors are:

Choose 2 of the following options.
   1. Stimulated by a decrease in pO2 of arterial blood
   2. Stimulated in an hypotensive subject at rest
   3. Subject to a blood flow of over 50ml/100g per minute
   4. Inhibited by a decrease in pH of arterial blood
   5. Stimulated by a decrease in pO2 of venous blood

10) Acidosis may result in:

Choose 3 of the following options.
   1. Potassium retention
   2. A rise in plasma chloride
   3. A low pCO2
   4. Tetany
   5. A low pO2

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