medical MCQs – Page 357

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 Review each marked answer and report any item that may be outdated or unclear.

7121. Immunologically active cells are_____________?
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A. MAST cells

B. Eosinophils

C. R.B.C s

D. Plasma cells
7122. Red colour blindness is called________________?
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A. Deuteranomaly

B. Deuteranopia

C. Protanomaly

D. Protanopia
7123. The reabsorption of sodium chloride is increased in proximal convoluted tubules by hormones secreted from______________?
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A. Anterior pituitary

B. Adrenal medulla

C. Adrenal cortex

D. Posterior pituitary

7124. In myasthenia gravis_______________?
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A. Muscles are rigid and tough

B. there is lack of acetyl choline

C. There is isometric contraction

D. Lack of acetyl choline receptors
7125. Tubular maximum for glucose is_____________?
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A. 375 mg/dl

B. 180 mg/dl

C. 325 mg/dl

D. 375 mg/dl
7126. Axon hillock is part of the soma of neuron which________________?
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A. Has dense Nissl grandules

B. Is round in shape

C. Has no Nissl granules

D. Is at commencement of dendrites

7127. Blood brain barriers is absent in all of the following areas except__________________?
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A. Habenuclear trigone

B. Neurohypophysis

C. Area posterma

D. Subfornical region

7128. GFR is increased when________________?
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A. Glomerular hydrostatic pressure is decreased

B. Tubular hydrostatic pressure is increased

C. Increased renal blood flow

D. Plasma oncotic pressure is increased

7129. A reliable screening test for platelet function is_______________?
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A. Clot retraction time

B. PT

C. Thrombin

D. CT

7130. IN acute infection which of the following is found_______________?
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A. Neutrophilia

B. Neutropenia

C. Leucopenia

D. Leukocytosis

7131. Acute bacterial pyogenic infection manifests as_________________?
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A. Leukocytosis

B. Neutropenia

C. Leukopenia

D. Lymphopenia

7132. The hyperosmolarity of the renal medulla is due to increased content of_____________?
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A. K+

B. Na+

C. Glucose

D. NH4+

7133. Which of the following is not a cause of secondary polycythemia ?
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A. High Altitude

B. Myeloproliferative changes

C. Pheochromocytoma

D. Cerebellar hemangioblastoma

7134. Thrombopoietin is produced by_________________?
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A. Liver

B. Megakaryocyte

C. Monocytes

D. Megakaryoblast

7135. Tubuloglomerular feedback occurs in______________?
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A. ADH secretion in collecting duct

B. Macula densa

C. Constant solute load on distal tubule

D. Balance between ascending and descending loop of henle

7136. In which segment of the nephron does tubular fluid has the highest osmolarity ?
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A. Distal tubule

B. Proximal tubule

C. Collecting duct

D. Henles loop
7137. Two substances that can probably be used to determine filtration fraction are_______________?
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A. Urea and diodrast

B. Inulin and PAH

C. Inulin and mannitol

D. PAH and Phenol red

7138. Sweat glands are supplied by only_______________?
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A. Motor nerves

B. Sympathetic nerves

C. Parasympathetic nerves

D. Sensory nerves

7139. Cardiac muscle contracts due to______________?
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A. Sarcoplasmic ca+2

B. Extracellular Na+

C. Intracellular Na+

D. Extracellular Ca+2
7140. Rigor mortis results after death is due to________________?
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A. Failure of break down of calcium bridges

B. Failure of acetylcholine to diffuse

C. Failure of ATP supply

D. None of the above