7251. 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
7252. 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

7253. Which of the following causes lysis of clot______________?
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A. Fibrin

B. Coagulase

C. Plasmin

D. Hyaluronidase

7254. 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

7255. In a blood sample antiserum A and antiserum B and Rh+ ve factor is added. No agglutination is seen. This is_______________?
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A. AB group and Rh+ ve

B. AB group and Rh ve

C. O group and Rh+ ve

D. O group and Rh- ve
7256. 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

7257. Fluid content of the blood is______________?
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A. Serum

B. Water

C. Plasma

D. Tissue fluid

7258. 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

7259. 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

7260. The cell junctions allowing exchange of cytoplasmic molecules between two cells are called________________?
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A. Focal junctions

B. Gap junctions

C. Anchoring junctions

D. Tight junctions

7261. 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
7262. 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

7263. 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

7264. Regulated bone growth through puberty occurs through__________________?
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A. Chondrophyseal plates

B. Epiphyseal plates

C. Ectophyeseal plates

D. Endophyseal plates

7265. Megaloblasts are precursors of_____________?
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A. Megakaryocytes

B. Norm oblasts

C. Myelocytes

D. Macrocytes

7266. 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
7267. 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

7268. Pain producing substance is________________?
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A. Histamine

B. Serotonin

C. Acetyl choline

D. Substance P
7269. Macula dense in kidney is located in relation to______________?
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A. Afferent arteriole

B. Efferent arteriole

C. PCT

D. DCT
7270. Each kidney contains about ______ nephrons ?
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A. Two million

B. One million

C. Four million

D. million

7271. Plasma colloid osmotic pressure is due to________________?
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A. Globulin

B. Albumin

C. Collagen

D. Fibrinogen

7272. Activation of which one of the following coagulation factors is not essential for hemostasis________________?
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A. X

B. IX

C. XI

D. XII
7273. Normal prothrombin time is____________?
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A. 30 sec

B. 10-20 sec

C. 5-7 sec

D. 1 min

7274. T- lymphocytes function to______________?
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A. Lymphokine production and delayed hypersensitivity

B. Immediate hypersensitivity

C. Complement activation

D. Antibody production

7275. The most outer covering of nerve fibres is called as____________?
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A. Axolemma

B. Myelin sheath

C. Perineurium

D. Neurolemma

7276. 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

7277. 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

7278. _________ is an example for rapidly acting neurotransmitter?
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A. Substance P

B. Somatostatin

C. Calcitonin

D. Glycine
7279. 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
7280. Epicrritic perception of pain occurs at the level of______________?
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A. Thalamus

B. Pulvinar

C. Area 3,1,2

D. Areas 5,7

7281. 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
7282. Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?
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A. Adaptation

B. Accommodation

C. Refractoriness

D. Electrotonus

7283. Hemostasis depends upon all the following, EXCEPT_______________?
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A. Prothrombin

B. Vitamin B

C. Vitamin K

D. Calcium

7284. In human the Hb is_______________?
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A. HbA

B. HbS

C. HbM

D. HbH

7285. The conversion of prothrombin to thrombin, the factor participate along with calcium is______________?
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A. Fibrin

B. Stable factor

C. Labile factor

D. Thromboplastin

7286. Preganglionic parasympathetic fibers are_______________?
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A. Sympathetic

B. Somatic only

C. Parasympathetic

D. Cholinergic
7287. Under resting condition the cardiac output is _______ L/ min ?
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A. 4.25

B. 5.25

C. 2.5

D. 9.5

7288. Ventricular muscle receives impulses directly from the_______________?
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A. Right and left bundle branches

B. Bundle of HIS

C. Purkinje system

D. AV node

7289. Absolute refractory period in heart______________?
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A. Longer than refractory period in skeletal muscle

B. Lasts till cardiac contraction

C. All of the above

D. A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus

E. Corresponds with duration of action potential

7290. The first heart sound is produced by the_____________?
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A. Closure of the mitral and tricuspid valves

B. Closure of the aortic and pulmonary valves

C. Opening of the mitral and tricuspid valves

D. Opening of the aortic and pulmonary valves

7291. Which of the following increases turbulence in blood flow ?
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A. Decrease in density of blood

B. Decrease in velocity of blood

C. Reynolds number < 2000

D. Increase in diameter of blood vessel
7292. Wallenberg degeneration is seen in______________?
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A. Proximal cut end of nerve with cell body

B. Distal cut end of nerve without cell body

C. Both the free ends of the cut nerve

D. All are true

7293. First heart sound occurs during the period of________________?
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A. Isotonic contraction

B. Isotonic relaxation

C. Isovolumetric contraction

D. Isovolumetric relaxation

7294. Closure of aortic valve occurs before the following event_______________?
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A. Isovolumetric contraction

B. Pre-systole

C. Pre-diastole

D. Isovolumetric relaxation
7295. Coronary blood flow is usually predominantly controlled by_____________?
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A. Parasympathetic impulses

B. Sympathetic impulse

C. Hormones

D. Auto regulation
7296. Pain sensation from the lateral extremities is transmitted by________________?
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A. Spinocerebellar tract

B. Spino thalmamic tract

C. Dorsal column

D. Corticospinal tract

7297. Parasympathetic stimulation of heart causes______________?
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A. Increased AV node excitability

B. Decreased ventricular contraction

C. SA node decreases firing

D. Tachycardia

7298. The largest function of the total peripheral resistance is due to _________________?
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A. Venules

B. Arterioles

C. Capillaries

D. Precapillary sphincters

7299. Swallowing center is situated in_______________?
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A. Pons

B. MIdbrain

C. Cerebellum

D. Medulla
7300. Sympathetic stimulation causes ______________?
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A. All of the above

B. Sweat secretion

C. Arteriolar constriction

D. Ciliary muscle contraction