5 - AIIMS November 2008 physiology mcqs

10.NITROGEN NARCOSIS IS CAUSED DUE TO?
A. INCREASED SUSCEPTIBILITY OF NEURONS FOR NITROGEN
B. NITROGEN INHIBITS DISMUTASE ENZYME
C. DECREASE IN OXYGEN FREE RADICALS
D. INCREASED PRODUCTION OF NITROUS OXIDE

11. CSF PRESSURE DEPENDS PRIMARILY UPON?
A.RATE OF FORMATION FROM CHOROID PLEXUS
A. RATE OF ABSORPTION
C. CEREBRAL BLOOD FLOW
D. BLOOD PRESSURE

12.ALL ARE NON FUNCTIONAL PLASMA ENZYMES EXCEPT?
A. LIPOPROTEIN LIPASE
B. HORMONE SENSITIVE LIPASE
C. ALKALINE PHOSPHATASE
D. PROSTATE SPECIFIC PHOSPHATASE

13.MAXIMUM POST PRANDIAL MOTILITY IS SEEN IN?
A. ASCENDING COLON
B. DESCENDING COLON
C. SIGMOID COLON
D. TRANSEVERSE COLON

14. VAGAL STIMULATION OF HEART CAUSES?
A. INCREASED HR
B. . INCREASED RR INTERVAL
C. . INCREASED CARDIAC OUTPUT
D. . INCREASED FORCE OF CONTRACTION

15. TRUE ABOUT WEBER FESCHNER LAW?
A. GRADATIONS OF STIMULUS STRENGTH ARE DISCRIMINATED APPROXIMATELY IN PROPORTION TO THE LOGARITHM OF THE STIMULUS STRENGTH
B.
C.
D.

16.CELLS PRESENT IN CEREBRAL CORTEX ARE ALL EXCEPT?
A. BIPOLAR CELLS
B. PURKINJE CELLS
D. GOLGI CELLS
D. GRANULE CELLS


17. WHICH DOES NOT LIES IN MEDULLA?
A. COLLECTING DUCT
B. JG APPARATUS
C. VASA RECTA
D. LOOP OF HENLE

18.MINERALOCORTICOID RECEPTORS ARE PRESENT IN ALL EXCEPT?
A. LIVER
B. GLOMERULAR TUBULES
C. COLON
D. HIPPOCAMPUS

19. WHICH IS TRUE?
A. CLEARANCE OF A SUBSTANCE IS GREATER THAN GFR IF TUBULAR SECRETION OCCOURS
B. CLEARANCE OF A SUBS IS ALWAYS INCREASED IF THERE IS TUBULAR SECRETION
C. DESCENDING LOH HAS HYPOTONIC URINE
D. DESCENDING LOH IS PERMEABLE TO SOLUTES

20. MEAN CIRCULATING FILLING PRESSURE IS?
A. DIFFERENCE BETWEEN CENTRAL VENOUS PRESSURE AND CENTRAL ARTERIAL PRESSURE
B. MEAN ATRIAL PRESSURE
C. ARTERIALPRESSURE TAKEN JUST AT THE POINT WHEN HEART STOPS BEATING
D. DIFFERENCE BETWEEN SYSTEMIC AND PULMONARY ARTERIAL PRESSURE

21.WHICH IS TRUE ABOUT PRESYNAPTIC INHIBITION?
A. OCCOURS DUE TO HYPERPOLARISATION OF PRESYNAPTIC MEMBRANE
B. OCCOURS DUE TO INHIBITION OF RELEASE OF NEUROTRANSMITTER FROM PRESYNAPTIC TERMINAL
C. PRODUCES ACTION POTENTIAL
D.

22.CIRCADIAN RHYTHM IS CONTROLLED BY?
A. SUPRACHIASMATIC NUCLEUS
B. MEDIAN EMINENCE
C. PARAMEDIAN NU
D. SUPRAOPTIC NUCLEI

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