physiology Mcqs
401. Electromyography is used for________________?
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A. To study muscle activity

B. Determine the centric occlusion

C. Determine class II malocclusion

D. Determine the centric relation

402. The most common problem with blood trans fusion_______________?
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A. Hypokalemia

B. Metabolic acidosis

C. Hemolytic reaction

D. Remission of disease

403. Serum is blood plasma without_____________?
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A. Fibrinogen

B. Plasma colloids

C. Lymphocytes

D. Blood cells

404. Skeletal muscles_____________?
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A. Contraction is initiated by calcium binding to troponin

B. Contracts when actin and myosin filaments shorten

C. Contracts when calcium is taken up by sarcoplasmic reticulum

D. Contraction is initiated by calcium binding to tropomyosin

405. The tissue macrophages are derived from the________________?
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A. Neutrophil

B. Eosinophil

C. Monocyte

D. All of the above

406. Which of the following represents most dangerous situation_____________?
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A. Rh+ ve mother, bearing her 1st Rh ve child

B. Rh+ ve mother, bearing her 2nd + ve child

C. Rh+ ve mother, who is bearing 2nd Rh+ ve child

D. Rh ve mover, bearing her 1stRh + ve child

408. Normal adult persons blood contains_____________?
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A. 10% basophils

B. 20% eosinophils

C. 30% lymphocytes

D. 40% neutrophils

409. Plasma ceruloplasmin alpha 2 globulins is a______________?
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A. beta 1 globulin

B. alpha 1 globulin

C. alpha 2 globulin

D. beta 2 globulin

410. Biconcave shape of RBC helps by___________________?
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A. Increasing flexibility

B. Passing easily through smaller capillaries

C. Increasing surface area

D. Carrying more Hemoglobin

411. Embryonic hemoglobin is composed of________________?
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A. Alpha and beta

B. Gamma and alpha

C. Gamma and beta

D. Epsilon and gamma

414. Proximal renal tubule is most permeable to _______________?
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A. Potassium

B. Sodium

C. Bicarbonate

D. Ammonia

415. Histamine is present on surface of_______________?
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A. Lymphocytes

B. Neutrophils

C. Mast cells

D. Erythrocytes

417. The renal clearance of _______________?
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A. Chloride increases after in injection of aldosterone

B. Inulin is lower than that of urea

C. PAH continues to rise as the plasma concentration of PAH increases

D. Creatinine indicates glomerular filtration rate

418. Hunger centre of brain is________________?
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A. Frontal lobe

B. Stria nigra

C. Temporal lobe

D. Hypothalamus
419. which receptor is responsible for monitoring the rate of muscle stretch ?
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A. Nuclear bag intrafusal fibers

B. Nuclear chain

C. Pacinium corpuscles

D. Golgi tendon organ

420. Hyper kinetic syndromes such as chorea and athetosis are usually associated with pathological changes in_______________?
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A. Motor areas of cerebral cortex

B. Anterior hypothalamus

C. Pathways for recurrent collateral inhibition in the spinal cord

D. Basal ganglia complex
421. Blood cells arise in bone marrow and are subject to______________?
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A. Regular renewal

B. None of the above

C. Irregular renewal

D. Infrequent renewal

422. Which of the following causes lysis of clot______________?
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A. Fibrin

B. Coagulase

C. Plasmin

D. Hyaluronidase

423. Major portion of glomerular filtrate is absorbed in__________________?
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A. Distal convoluted tubule

B. Proximal segment

C. Collecting duct

D. Loop of Henle

425. Increased blood viscosity and slow circulation causes______________?
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A. RBC rouleax formation

B. None

C. Increased number of RBC in capillaries

D. Increased plasma skimming

426. Fluid content of the blood is______________?
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A. Serum

B. Water

C. Plasma

D. Tissue fluid

427. AB group has following agglutinins_______________?
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A. Anti A

B. Anti B

C. Neither anti A nor anti B

D. Anti A & Anti B

428. To measure renal plasma clearance compound should be_________________?
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A. Completely filtered by glomerulus

B. Bound to plasma protein

C. Secreted by the tubules

D. <70,000 Mol.wt

430. Small lymphocyte is _____________?
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A. Bigger than RBC

B. None of these

C. Same as the size of RBC

D. Smaller than RBC
431. The part of nephron least permeable to water is______________?
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A. Descending limb of loop of Henle

B. Ascending limb of loop of Henle

C. Collecting tubule

D. Proximal tubule

432. T- lymphocytes play a primary role in_________________?
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A. production of lymphokines and delayed hypersensitivity

B. Production of Antibodies

C. Immediate Hypersensitivity

D. Activation of complement system

433. Regulated bone growth through puberty occurs through__________________?
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A. Chondrophyseal plates

B. Epiphyseal plates

C. Ectophyeseal plates

D. Endophyseal plates

434. Megaloblasts are precursors of_____________?
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A. Megakaryocytes

B. Norm oblasts

C. Myelocytes

D. Macrocytes

435. True about nephron is_____________?
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A. The filtrate reaching distal convoluted tubule is hypertonic with respect to surroundings

B. Absorption of water occurs in ascending loop of Henle

C. Na is absorbed actively in descending loop of Henle

D. 60 to 70% of GFR is absorbed in proximal tubule
436. The anticoagulant of choice used in the blood bank is_______________?
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A. Calcium oxalate

B. Sodium fluoride

C. Acid citrate dextrose solution

D. Heparin solution

437. Pain producing substance is________________?
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A. Histamine

B. Serotonin

C. Acetyl choline

D. Substance P
438. Macula dense in kidney is located in relation to______________?
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A. Afferent arteriole

B. Efferent arteriole

C. PCT

D. DCT
439. Each kidney contains about ______ nephrons ?
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A. Two million

B. One million

C. Four million

D. million

440. Plasma colloid osmotic pressure is due to________________?
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A. Globulin

B. Albumin

C. Collagen

D. Fibrinogen

442. Normal prothrombin time is____________?
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A. 30 sec

B. 10-20 sec

C. 5-7 sec

D. 1 min

443. T- lymphocytes function to______________?
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A. Lymphokine production and delayed hypersensitivity

B. Immediate hypersensitivity

C. Complement activation

D. Antibody production

444. The most outer covering of nerve fibres is called as____________?
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A. Axolemma

B. Myelin sheath

C. Perineurium

D. Neurolemma

445. The kidney secrete all of the following hormones except_____________?
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A. Erythropoietin

B. Vasopressin

C. Renin

D. 1,2,5 Dihydroxy cholecalciferol

446. primary cause of bleeding disorder in liver damage is due to______________?
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A. Decreased level of prothrombin

B. Lack of vitamin B

C. Platelet deficiency

D. Lack of vitamin K

447. _________ is an example for rapidly acting neurotransmitter?
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A. Substance P

B. Somatostatin

C. Calcitonin

D. Glycine
448. The normal adult value of urine output________________?
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A. 2 l/day

B. 3 l/day

C. 0.5 l/day

D. 1.5 l/day
450. Which of the following events DO NOT occur in rods in response to light_______________?
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A. Decreased intracellular cGMP

B. Activation of transducin

C. Structural changes in rhodopsin

D. Opening of Na+ channels