Physiology 10 Mcqs - 1 - NotesMedicine

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1. Blood group antigens (agglutinogens) are

Carried on hemoglobin molecules.

are glycoproteins

Equally immunogenic

Absent in fetal blood.

2. Which of the following is false about veins?

Veins contain most of the blood volume.

Veins have sympathetic vasoconstrictor innervation.

Veins respond to distention by contraction of their smooth muscles.

Veins receive nutrition from vasa vasorum arising from their lumen.

3. Cerebrospinal fluid

Is formed in the arachnoid granulations.

Protects the brain from injury when the head is moved.

Provides the brain with most of its nutrition.

Has a lower pressure than that in the cerebral venous sinuses.

4. Impulses serving pain sensation in the left foot are relayed

Across synapses in the left posterior root ganglion.

By fibers in the left spinothalamic tract.

By the same spinal cord tract which serves heat and cold sensation.

To the cerebral cortex.

5. The cones in the retina differ from rods in that they are more

Concerned with color vision

Numerous.

Affected by vitamin A deficiency.

Sensitive to light.

6. nystagmus (Involuntary oscillatory eye movements)

May result from cochlear disease.

Occur when cold fluid is run into one external ear canal.

Do not affect acuity of vision.

Do not occur in healthy people.

7. In fluid in the distal part of the proximal convoluted tubule

pH is less than 6 when the kidneys are excreting an acid urine.

Osmolality is about 25 per cent that of glomerular filtrate.

Glucose concentration is similar to that in plasma.

Bicarbonate concentration is lower than in plasma.

8. Glucocorticoid injections lead to increases in

Membrane stability in mast cell and lysosomes.

Anabolic activity in muscle.

Fibroblastic activity.

Lymph gland size.

9. Human chorionic gonadotrophic hormone (HCG)

Is formed in the anterior pituitary.

Can be detected in the urine as an early sign of pregnancy.

Acts directly on the uterus to maintain the endometrium.

Is a steroid.

10. Inherited diseases associated with sex-linked recessive genetic disorders

Are transmitted by the female but not by the male.

Are more common in females than in males.

Involve the Y rather than the X chromosome.

May fail to manifest themselves in female carriers.

Physiology 10 Mcqs – 1

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