Physiology 10 Mcqs – 3

Welcome to your Physiology 10 Mcqs – 3

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1. Circulating red blood cells

Are about 1 per cent nucleated.

May show an intracellular network pattern if appropriately stained.

Are distributed evenly across the blood stream in large blood vessels.

Travel at slower velocity in venules than in capillaries.

2. In the brachial artery

Pulse waves travel at the same velocity as blood.

Pulse pressure falls with decreasing elasticity of the wall.

Pressure rises markedly when the artery is occluded distally.

Pressure falls when the arm is raised above head level.

3. Pulmonary surfactant increases

The surface tension of the fluid lining alveolar walls.

Lung compliance.

In effectiveness as the lungs are inflated.

In amount when pulmonary blood flow is interrupted.

4. The risk of developing gallstones increases

When cholesterol micelles are formed in the gall bladder.

As the lecithin:cholesterol ratio increases.

When supplementary bile salts are taken by mouth.

In patients with hemolytic anemia.

5. Exercise which doubles the metabolic rate is likely to at least double the

Oxygen consumption.

Cardiac output.

Arterial PCO2.

Stroke volume.

6. With increasing age there is a fall in the

Arterial pulse pressure.

Fasting blood glucose concentration.

Residual volume of the lungs.

Ability of the kidneys to concentrate urine.

7. Excessive glucocorticoid production (Cushing’s syndrome) causes an increase in

Skin thickness.

Bone strength.

Blood glucose.

Arterial pressure.

8. Impaired growth hormone secretion

Is associated with pale, fine and soft skin.

In children causes delayed puberty.

In children leads to short stature with more stunting of the limbs than the trunk.

In adults leads to a reduction in the size of the viscera.

9. Blockade of parasympathetic activity causes a reduction in

Resting heart rate.

Sweat production.

Intestinal motility.

The strength of skeletal muscle contraction.

10. In sensory receptors

A generator potential can be produced by only one form of energy.

The generator potential is graded and self-propagating.

The frequency of action potentials generated doubles when the strength of the stimulus doubles.

Stimulus energy is converted into a local depolarization.

Physiology 10 Mcqs – 3

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