medical MCQs – Page 245

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

4881. Plasma factor present in both serum & plasma is____________?
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A. II

B. Fibrinogen

C. VII

D. V

4882. Hemoglobin is the major buffer in blood, bicarbonate ions diffuse out of erythrocyte into plasma in exchange of_______________?
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A. Phosphate

B. Chloride ion

C. Carbonic acid

D. Potassium

4883. In renal glycosuria, the renal threshold for glucose is_______________?
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A. Low

B. Greatly increased

C. Same

D. High

4884. The function of vitamin K is______________?
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A. Prothrombin formation

B. Fibrin formation

C. Thromboplastin formation

D. Thrombin formation

4885. Potassium is maximum in_____________?
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A. Interstitium

B. Bone

C. Cell

D. Plasma

4886. Blood cells arise in bone marrow and are subject to______________?
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A. Regular renewal

B. Infrequent renewal

C. Irregular renewal

D. None of the above

4887. What is true about pneumothorax ?
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A. Increased lung compliance

B. Total chest wall diameter is increased

C. The concentration of surfactant is reduced in alveoli

D. Interpleural pressure becomes more negative

4888. Meiotic division of male germ cells commence_______________?
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A. just before birth

B. by around 16 years

C. by around 6 years after birth

D. During intra uterine life

4889. During the initial part of inspiration, which of the following does not occur ?
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A. Intrapulmonary pressure falls

B. The partial pressure of O2 in dead space rises

C. Intra thoracic pressure rises

D. Intra-abdominal pressure rises

4890. Two substances that can probably be used to determine filtration fraction are_______________?
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A. Inulin and PAH

B. Inulin and mannitol

C. Urea and diodrast

D. PAH and Phenol red

4891. In a DNA molecule adenine always forms a linkage with______________?
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A. Thymine

B. Uracil

C. Cytosine

D. Guanine

4892. Which of the following is important in renal excretion of hydrogen ion ?
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A. Combining H+ with Cl- to form Hcl

B. Trapping H+ by NH3+

C. Combining H+ and HCO3- via enzyme carbonic anhydrase

D. Trapping H+ by acetate

4893. Proximal renal tubule is most permeable to _______________?
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A. Ammonia

B. Sodium

C. Potassium

D. Bicarbonate

4894. GFR is increased when________________?
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A. Tubular hydrostatic pressure is increased

B. Glomerular hydrostatic pressure is decreased

C. Plasma oncotic pressure is increased

D. Increased renal blood flow

4895. Biconcave shape of RBC helps by___________________?
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A. Increasing surface area

B. Carrying more Hemoglobin

C. Increasing flexibility

D. Passing easily through smaller capillaries

4896. Valve of Hasner is present at________________?
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A. Naso lacrimal duct

B. Stensons duct

C. common bile duct

D. maxillary Sinus

4897. In peripheral tissues which of the following contains substance P______________?
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A. Plasma cell

B. Mast cell

C. Nerve terminal

D. Vascular endothelium

4898. A decrease in the arterial PO2 is seen in______________?
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A. High altitudes

B. Decrease in hemoglobin concentration of arterial blood

C. Sluggish blood flow

D. Paralysis of inspiratory muscles

4899. Each kidney contains about ______ nephrons ?
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A. One million

B. million

C. Two million

D. Four million

4900. Gut associated lymphoid tissue ( GALT) is primarily located in______________?
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A. Submucosa

B. Muscularis

C. Serosa

D. Lamina propria

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