physiology Mcqs
351. Plasma thromboplastin antecedent is______________?
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A. Anti-hemophiliac C factor

B. Anti-hemophiliac F factor

C. Anti-hemophiliac A factor

D. Anti-hemophiliac B factor

353. The first physiological response to high environmental temperature is_______________?
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A. Decrease heat production

B. Non- shivering thermogenesis

C. Sweating

D. Vasodilatation
354. Functional unit of kidney is______________?
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A. Glomerulus

B. Collecting ducts

C. Loop of Henle

D. Nephron
355. To preserve blood for transfusion later______________?
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A. Add solution of calcium chloride

B. Dilute with equal volume of 0.9% saline

C. Add solution of sodium citrate

D. Add fibrinogen

357. The renal threshold for glucose is_______________?
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A. 80 mg/dl

B. 100 mg/dl

C. 180 mg / dl

D. 120 mg/dl

358. Tissues with least regenerative potential is________________?
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A. Nerve

B. None of the above

C. Cardiac muscle

D. Skin

359. Which of the following is not a vitamin K dependent procoagulant ?
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A. Factor II

B. Factor XI

C. Factor IX

D. Factor VII

360. Renin secretion is stimulated by all except_____________?
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A. Cardiac failure

B. Sympathetic stimulation

C. Low Na+ in proximal tubule

D. High Na+ in proximal tubule
361. Lysis of RBCs are seen in all of the following except__________?
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A. Obstructive jaundice

B. Thalassemia

C. Sickle cell anemia

D. Methotrexate therapy

362. Most of the sodium is reabsorbed in_____________?
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A. Loop of henle

B. Vasa recta

C. PCT

D. DCT

363. A decrease in the urine output is called_____________?
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A. Plyuria

B. Oliguria

C. Dysuria

D. Nocturia

364. Erythropoietin is produced in the_______________?
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A. Kidney

B. Spleen

C. Liver

D. Bone marrow

365. Receptors for olfactory sensation are present in ______________?
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A. None of the above

B. Nasal septum

C. Lateral walls

D. Lateral wall and nasal septum above superior concha
367. During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?
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A. Less negative

B. Equal to the intra alveolar pressure

C. Positive

D. More negative
369. Meiotic division of male germ cells commence_______________?
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A. by around 6 years after birth

B. During intra uterine life

C. by around 16 years

D. just before birth

371. The pathway of pain from teeth and temperature is carried by ______________?
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A. Lateral spinothalamic tract

B. Corticospinal tract

C. Corticocerebral tract

D. Ventral spinothalamic tract

372. Intention tremor is a feature of _______________?
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A. Loss of function of Thalamus

B. Loss of function of Hypothalamus

C. Loss of function of Basal ganglia

D. Loss of function of cerebellum
374. Which of the following agents in not likely to be found in plasma ?
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A. Thrombin

B. Prothrombin

C. Fibrinogen

D. Calcium ion

375. In osmotic diuresis there is_______________?
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A. Decrease in reabsorption of Na Cl

B. Increase in NaCl concentration in urine

C. Increase in renal blood flow

D. Increase in glomerular filtration rate

376. The major functional difference between DNA and RNA is_____________?
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A. RNA contains ribose

B. RNA does not contain thymine

C. DNA carries the information in all organizations

D. DNA is localized in nucleus

377. Regarding Golgi tendon organ true is ______________?
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A. Involved in reciprocal innervation

B. Senses dynamic length of muscle

C. a- motor neuron stimulation

D. Sense muscle tension
380. Skeletal muscles______________?
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A. Contraction is initiated by calcium binding to troponin

B. Contracts when actin and myosin filaments shorten

C. Contraction is initiated by calcium binding to tropomyosin

D. Contracts when calcium is taken up by sarcoplasmic reticulum

381. function of Merkels cells is_______________?
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A. Melanophage

B. Chemoreceptor

C. Tactile sensation

D. Proprioception

382. The percentage of body water is greater in_______________?
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A. Obese than in lean individuals

B. Male than in females

C. Children than in adult

D. old than in young objects

383. In CNS, the myelination is carried out by _____________?
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A. Microglia

B. Oligodendrocytes

C. Schwann cells

D. Astrocytes

384. Following are extrapyramidal tracts except______________?
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A. Corticospinal

B. Reticulospinal

C. Vestibulospinal

D. Rubrospinal

385. All are features of skeletal muscle except______________?
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A. Cylindrical

B. Multiple nuclei

C. Centrally placed nuclei

D. Transverse striation

386. Cell bodies of the neurons which carry taste sensation from the anterior 2/3rd of the tongue are located in________________?
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A. Superior cervical ganglion

B. Otic ganglion

C. Geniculate ganglion

D. Trigeminal nerve ganglion

387. Bacteria are most commonly ENGULFED by _________________?
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A. Neutrophilic leukocytes

B. Large granular lymphocytes

C. Killer cells

D. Small lymphocytes

388. Body temperature is maintained by ______________?
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A. all of the above

B. Covering of the body

C. Peripheral vasoconstriction

D. Postural position

389. Decreased basal metabolic rate is seen in_______________?
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A. Feeding

B. Exercise

C. Obesity

D. Hyperthyroidism

390. Decreased MCHC is found in_____________?
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A. Vit B12 deficiency

B. Megaloblastic anemia

C. Microcytic hypochromic anemia

D. Sideroblastic anemia

392. Secondary granules of neutrophils contain______________?
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A. Lactoferrin

B. Myeloperoxidase

C. Nucleosidase

D. Catalase

393. Inulin clearance closely resembles_____________?
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A. Creatinine clearance

B. P.A.H. clearance

C. G.F.R

D. Renal plasma flow

394. Small packets of acetylcholine released randomly from the nerve cell membrane at rest Produces_______________?
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A. Inhibitory post synaptic potential

B. Action potential

C. End plate potential

D. Miniature end plate potential
395. Copious flow of watery saliva is secreted in response to _____________?
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A. CNS stimulation

B. sensory stimulation

C. Sympathetic stimulation

D. Parasympathetic stimulation
396. The skeletal muscle action potential______________?
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A. Begins with an, in ward movement of K+ ins

B. Spreads in ward to all parts of the muscle via the t- tubule system

C. Is not essential for contraction to occur

D. Has a prolonged plateau phase?

398. Blood supply to the brain during moderate exercise________________?
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A. Remains constant

B. decreases

C. Increases

D. Increases then decreases

399. Diuresis is caused by______________?
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A. Urea

B. Mannitol

C. Glycerol

D. All of the above
400. Which of the following is important in renal excretion of hydrogen ion ?
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A. Trapping H+ by acetate

B. Combining H+ and HCO3- via enzyme carbonic anhydrase

C. Trapping H+ by NH3+

D. Combining H+ with Cl- to form Hcl