physiology MCQs – Page 16

Practise focused physiology questions with marked answers for exam preparation and subject revision.

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

B. Na+

C. Glucose

D. NH4+

302. 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

303. Thrombopoietin is produced by_________________?
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A. Liver

B. Megakaryocyte

C. Monocytes

D. Megakaryoblast

304. 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

305. 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
306. 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

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

B. Sympathetic nerves

C. Parasympathetic nerves

D. Sensory nerves

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

B. Extracellular Na+

C. Intracellular Na+

D. Extracellular Ca+2
309. 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

310. Open faced nucleus in a cell signifies______________?
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A. that the cell is active

B. That the cell is resting

C. that the cell is in transition phase

D. nothing

311. ESR depends on_______________?
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A. All of the above

B. Viscidity

C. Rouleaux

D. Fibrinogen

312. the acrosome reaction occurs, when the sperm_____________?
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A. Comes in contact with zone pellucida

B. Enters the uterine cavity

C. Penetrates cell membrane of oocyte

D. Penetrates corona radiate

313. Christmas factor is_____________?
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A. PTA

B. VWA

C. Prothrombin

D. PTC
314. Function of GABA on CNS is_______________?
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A. Neuronal inhibition

B. Glial cell activation

C. Neuronal activation

D. Glial cell inhibition

315. Two major types of muscle fibres are found in humans_____________?
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A. White and red

B. White and yellow

C. white and brown

D. White and gray

316. The glomerular filtration rate of the human kidney may be determined by measuring the plasma clearance of______________?
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A. Urea

B. PAH

C. Inulin

D. Glucose

317. The biological anticoagulant is________________?
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A. Sodium citrate

B. Hirundine

C. Double oxalate mixture

D. EDTA

318. The largest fraction of the total body fluid is_______________?
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A. Whole blood

B. Extracellular fluid

C. Intracellular fluid

D. Plasma

319. Universal blood donor ill be a blood group of_______________?
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A. Positive

B. Negative

C. AB positive

D. AB negative

320. The major sign of hypoventilations_____________?
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A. Hypercapnia

B. Hypoxia

C. Dyspnea

D. Cyanosis