physiology Mcqs
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

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

321. The function common to neutrophils, monocytes & macrophages is______________?
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A. Liberation of histamine

B. Destruction of old erythrocytes

C. Phagocytosis

D. Immune response

322. Albumin is_____________?
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A. Nucleo protein

B. Phospho protein

C. Chromo protein

D. Simple protein
323. Most important function of albumin in body is_______________?
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A. Coagulation

B. Oncotic pressure

C. Toxic transport

D. Drug transport

324. Which of the following is not true about axonotmesis ?
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A. Impairment of both sensory and motor function

B. Wallerian degeneration

C. Intact neural sheath is not present

D. Reversible loss, which will be regenerated i 6-8 wks

325. Hemoglobin has______________?
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A. Four heme molecules and four polypeptide chains

B. Four heme molecules, 2? and 2? chains

C. One heme and one globin molecule

D. Four polypeptide chains, 2?, 1?,1? chain

326. Which of the following is not involved in blood clotting ?
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A. Fibrinogen

B. Fe+2

C. Calcium

D. Prothrombin

328. What is the glomerular filtration rate ?
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A. 150 ml/min

B. 175 ml/min

C. 100 ml/min

D. 125 ml/min
329. A patient with A ve blood group can receive blood from_______________?
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A. Positive donor

B. AB positive donor

C. A negative donor

D. B negative donor

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

B. Fibrin formation

C. Thrombin formation

D. Thromboplastin formation

332. Citrate is a useful anticoagulant because of its ability to_____________?
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A. Chelate calcium

B. Bind vitamin K

C. Bind factor XII

D. Buffer basic groups of coagulation factors

333. Phagocytosis in the CNS is done by _______________?
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A. Schwann cells

B. Oligocytes

C. Astrocytes

D. Microglia
334. Potassium is maximum in_____________?
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A. Interstitium

B. Bone

C. Plasma

D. Cell
335. Which of the following cell type is not a precursor of erythrocyte____________?
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A. Myeloblast

B. Reticulocyte

C. Norm oblast

D. PR erythroblast

336. The end plate potential is characterized by_____________?
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A. Hyper polarization

B. Propagation

C. All or none law

D. Depolarization
337. Voluntary movement of eye ball is controlled by______________?
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A. Cerebellum

B. Superior colliculus

C. Visual cortex area

D. Frontal eye field

338. Formation of a small volume of concentrated urine in dehydration is associated with____________?
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A. More reabsorption in the PCT

B. More concentration in loop of Henle

C. More reabsorption of DCT and collecting ducts

D. All of these
342. Thromboxane is produced mainly by _______________?
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A. Vascular endothelium

B. Platelets

C. Liver

D. Damaged tissue

343. Life cycle of RBC is_______________?
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A. 120 days

B. 90 days

C. 12 days

D. One month

344. AB blood group antigen are known as ________ factors?
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A. Landsteiner

B. Rhesus

C. Lutheran

D. Duffy

345. Group B fibers are present in_____________?
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A. Spinothalamic tracts

B. Golgi tendon apparatus

C. Autoonomic preganglionic fibers

D. Intrafusal fibers of the muscle spindle

346. A motor unit is made up of______________?
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A. A flexor muscle and an extensor muscle

B. A single motor neuron and all the muscle fibers it innervates

C. A single skeletal muscle and all the motor peurons that supply it

D. All the motor neurons in which response are observed after maximal stimulation of a single sensory nerve

347. Stimulating mechanoreceptors or nociceptors in mouth triggers the_______________?
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A. Jaw clenching reflex

B. Jaw gnashing reflex

C. Jaw opening reflex

D. None of the above

349. In PHC, which anticoagulant is used to send the blood sample for blood glucose_____________?
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A. Potassium oxalate

B. EDTA

C. Heparin

D. Potassium oxalate+ sodium fluoride
350. Iron is stored in_______________?
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A. Plasma

B. Reticule endothelial system

C. RBC

D. All