physiology Mcqs
201. Kussmamuls respiration occurs in response to_______________?
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A. Decrease in pH of blood

B. Increase in pH of blood

C. Carbon monoxide poisoning

D. Obstructive pulmonary disease

205. Upstroke of action potential would lead to________________?
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A. Cell interior becomes more negative

B. Net current in an outward direction

C. Cell interior becomes less negative

D. None of the above

206. Delta waves of Electroencephalogram have frequency of ______________?
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A. More than 14 cycles per second

B. Between 8 and 13 cycles per second

C. Less than 3.5 cycles per second

D. Between 4 and 7 cycles per second

208. DOPA and 5 Hydroxytryptophan are clinically important because______________?
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A. They cross Blood Brain Barriers

B. They act as neuromodulators

C. They are metabolites of various neurogentic amines .

D. They are acidic precursors of Brain amines

211. Contractile element in myofibril is_______________?
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A. Sarcomere

B. Sarcoplasm

C. A line

D. H band

213. The only fixed cell of the connective tissue_______________?
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A. Mast cell

B. Neutrophils

C. Histiocyte

D. Lymphocyte

214. Serum is______________?
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A. Blood RBC

B. Plasma- fibrin

C. Plasma- clotting factors

D. Blood all cellular elements

216. Succinyl choline acts to block neuromuscular transmission by_______________?
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A. Inhibiting cholinesterase

B. Depolarizing the motor end plate of skeletal muscle

C. Inhibiting the CNS

D. Blocking the release of acetyl choline at the end plate

218. Patient with anemia tends to have all, except________________?
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A. A low PO2 in arterial blood

B. Pallor of mucous membranes

C. Increased incidence of heart murmurs

D. Compensatory increase in cardiac output

219. Brocas area is concerned with______________?
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A. Comprehends language not speaking

B. Is the confluence of somatic , auditory and visceral areas

C. Word formation

D. Present in posterior part of temporal lobe

220. Which among the following is also called peak less insulin analog ?
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A. Lente insulin

B. Insulin aspart

C. Insulin lispro

D. Insulin glargine
223. First change to occur after nerve cut is_______________?
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A. Axonal sprouting

B. Schwan cell mitosis

C. Nuclear disintegration

D. Myelin sheath degeneration
225. Breathing ceases upon destruction of the___________________________?
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A. Medulla oblongata

B. Cerebellum

C. Cerebrum

D. Hypothalamus

226. Bleeding time is prolonged in a person who_______________?
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A. Takes coumarin derivatives

B. Has liver disease

C. Takes large quantities of aspirin

D. Lacks factor VIII

227. Plasma cells are constituent of_____________________?
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A. Epithelial tissue

B. Nervous tissue

C. Muscular tissue

D. Connective tissue
230. The absolute refractory period of an action potential is due to _______________?
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A. Inactivation of Na+ k+ ATPase

B. Depletion of intracellular Na+

C. Insufficient neurotransmitter

D. Voltage inactivation of the Na+ channel
231. Mineral essential for Hb synthesis_______________?
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A. Phosphorus

B. Copper

C. Sodium

D. Potassium

232. Which of the following is not a marker of bone formation_________________?
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A. Alkaline phosphatase

B. Procollagen marker

C. Hydroxy proline

D. Osteocalcin

233. True statement regarding hematopoiesis includes______________?
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A. None

B. Spleen plays a major role in adults (in lymphopoiesis )

C. Committed stem cells differentiates into only one cell type

D. RES plays a role
234. During exercise_____________?
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A. Lymphatic flow from muscle decrease

B. Body temperature increases

C. Blood flow to muscle increases after 1 minute

D. Cerebral blood flow increases if there is increase in systolic blood pressure

235. The main types of muscle cells are______________?
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A. All of the above

B. Skeletal and cardiac

C. Smooth and skeletal

D. Smooth and cardiac

236. The principal site for granulocytic hemopoiesis in the adult human is________________?
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A. Red bone marrow

B. Yellow bone marrow

C. The liver

D. The spleen

237. Non true regarding Na/K pump is______________?
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A. Increase in intracellular Na

B. 5 Na+ exchanged for 2K+

C. Hypocalcemia inhibits the pump

D. Pumps Na against a gradient

238. Intracellular and interstitial body fluids have similar______________?
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A. Potassium ion concentrations

B. Total osmotic pressure

C. Chloride ion concentrations

D. Colloid osmotic pressure

239. Following are the changes during accommodation except_______________?
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A. Increase in the anterior curvature of lens

B. Convergence of eye ball

C. Dilatation of pupil

D. Constriction of pupil

240. Survival time of platelet is approximately______________?
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A. 100 days

B. 10 weeks

C. 10 hours

D. 10 days
241. Tendon (or) ligament is attached to a bone through ____________?
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A. Haversian fibers

B. Sharpeys fibers

C. Tomes fibers

D. Interstitial fibers

242. Histiocytes are_____________?
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A. Allergic cells

B. Scavenger cells

C. Released in immunologic response

D. Leukocytes

243. Most effective method of assessing breathing is by measuring____________?
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A. Alveolar ventilation

B. Tidal volume

C. Respiratory rate

D. FEV 1
245. The normal brown red color of feces results from the presence of_______________?
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A. Stercobilin

B. Heme

C. Bilirubin diglucuronide

D. Biliverdin

246. Which is caused by acetylcholine through nicotinic receptors_____________?
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A. Decrease of heart rate

B. Contraction of pupils

C. Contraction of skeletal muscle

D. Secretion of saliva

247. Delay in blood coagulation results from________________?
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A. Ferric chloride

B. Heparin

C. Human thrombin

D. Vit- K

248. Brush border is seen in________________?
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A. Proximal convoluted tubule

B. Loop of Henle

C. Distal convoluted tubule

D. Bowmans capsule

249. In peripheral tissues which of the following contains substance P______________?
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A. Plasma cell

B. Nerve terminal

C. Mast cell

D. Vascular endothelium

250. Immune complexes are removed from blood by _____________?
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A. Basophil

B. Plasma cell

C. Kupffer cell

D. B cell