medical MCQs – Page 251

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 Review each marked answer and report any item that may be outdated or unclear.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

5001. Energy expenditure during normal breathing____________?
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A. 2% 3% of total energy spent

B. 25% 50% of total energy spent

C. 50% -75% of total energy spent

D. 15% 20% of total energy spent

5002. Site of ADH action is______________?
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A. Loop of Henle

B. Proximal tubule

C. Collecting tubule

D. Vasa recta

5003. The largest fraction of the total body fluid is_______________?
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A. Extracellular fluid

B. Intracellular fluid

C. Plasma

D. Whole blood

5004. Decreased MCHC is found in_____________?
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A. Megaloblastic anemia

B. Vit B12 deficiency

C. Sideroblastic anemia

D. Microcytic hypochromic anemia

5005. Ions participating in clotting mechanism are________________?
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A. Iron

B. Calcium

C. Aluminum

D. Copper

5006. In which segment of the nephron does tubular fluid has the highest osmolarity ?
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A. Collecting duct

B. Proximal tubule

C. Henles loop

D. Distal tubule

5007. Which of the following is not a marker of bone formation_________________?
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A. Hydroxy proline

B. Alkaline phosphatase

C. Osteocalcin

D. Procollagen marker

5008. During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?
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A. Equal to the intra alveolar pressure

B. Positive

C. More negative

D. Less negative

5009. Arterial PO2 is reduced in_____________?
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A. CO poisoning

B. KCN poisoning

C. Pulmonary hypoventilation

D. Anemia

5010. Christmas factor is_____________?
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A. VWA

B. PTA

C. Prothrombin

D. PTC

5011. To check objective pain response, which is best used method_______________?
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A. H- Reflex

B. Facial pain scale

C. Knee jerk reflex

D. R III Reflex

5012. Most of the sodium is reabsorbed in_____________?
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A. Vasa recta

B. PCT

C. DCT

D. Loop of henle

5013. Minimum blood pressure is in_____________?
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A. Aorta

B. Capillaries

C. Venules

D. Arteries

5014. The dicrotic notch on the aortic pressure curve is caused by_________________?
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A. Contraction of the atria

B. Closure of the aortic valve

C. Rapid filling of the left ventricle

D. Closure of the pulmonary valve

5015. The temperature of body is controlled by_______________?
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A. Medulla

B. Precentral gyrus

C. Diencephalon

D. Hypothalamus

5016. Afferent component of corneal reflex is mediated by ________________?
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A. Facial nerve

B. Glossopharyngeal nerve

C. Trigeminal nerve

D. Vagus nerve

5017. Chromatolysis is______________?
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A. Disappearance of nissel granules

B. Disintegrating of Nucleus

C. Disintegration of golgi apparatus

D. Decrease in cell size

5018. What is common between systemic and pulmonary circulation is_____________?
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A. Pulse Pressure

B. Volume of the circulation per minute

C. Peripheral vascular resistance

D. Total Capacity

5019. Blood supply to the brain during moderate exercise________________?
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A. decreases

B. Increases then decreases

C. Increases

D. Remains constant

5020. Delta waves of Electroencephalogram have frequency of ______________?
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A. Between 8 and 13 cycles per second

B. Between 4 and 7 cycles per second

C. More than 14 cycles per second

D. Less than 3.5 cycles per second

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