All India Institute of Medical Sciences 2009 AIPG BIOCHEMISTRY - Question Paper

PHYSIOLOGY

Q1. Diastolic pressure in aorta is maintained by:
a- Elastic recoil of aorta
b- Muscular artery
c- Resistance in arterioles
d- Capillaries
Ans: a.

Q2. Central chemoreceptors are most sensitive to:
a- Increase in CO2 tension
b- reduce in CO2 tension
c- Low CO2 tension
d- Increase in H+
Ans: a.

Q3. actual for vasomotor center is:
a- Not influenced by cortical centers
b- Stimulated by baroreceptors from arterial organs
c- In sleep medulla stops sending signals which explains reduce in BP
d- Functional interaction with cardio-vagal center
Ans: d.

Q4. Interior factor of castle is current in:
a- Chief cells
b- Fundus cells
c- Goblet cells
d- Parietal cells
Ans: d.

Q5. Facilitated diffusion:
a- Requires carrier protein
b- Is a form of active transport
c- Along concentration gradient
d- Requires creatinine phosphate
Ans: a.

Q6. Action potential generated in axon hillock is due to:
a- It has lowest threshold
b- Neurotransmitters produced
c- Unmyelinated
d- Has more ion channels
Ans: d.

Q7. Cell-cell interaction occurs by all of the subsequent mechanism except:
a- Hormones
b- Gap junctions
c- G-protein receptors
d- Neurotransmitters released at synapse
Ans: c.

Q8. In obstructive azoospermia:
a- FSH and LH both increase
b- FSH and LH both normal
c- FSH reduce but LH increases
d- FSH and LH both reduce
Ans: b.

Q9. Which is not involved in intrinsic pathway?
a- Factor XII
b- Factor XI
c- Factor IX
d- Factor VII
Ans: d.

Q10. reason of sigmoid shape of oxygen-hemoglobin dissociation curve (O2) is:
a- Binding of 1 O2 molecule increase the affinity of binding of other O2 molecules
b- Binding of 1 O2 molecule reduce the affinity of binding of other O2 molecules
c- Bohr effect
d- Haldane effect
Ans: a.

Q11. Sertoli cells are associated with:
a- Spermiogenesis
b- Secretion of seminal fluid
c- Production of testosterones
d- Production of sperm
Ans: a.

Q12. Sleep is primarily regulated by:
a- Thalamus
b- Hypothalamus
c- Putamen
d- Limbic cortex
Ans: b.

Q13. Paneth cells are rich in:
a- Zinc
b- Lysozyme
c- Mucus
d- Intrinsic factor
Ans: Both a and b.

Q14. Muscle’s blood supply increases during exercise due to:
a- Increased blood pressure
b- Accumulation of active metabolites
c- Increase vasodilatation
d- Increase heart rate
Ans: b.

Q15. The status of fluid in distal convoluted tubule is all except:
a- Always hypotonic
b- Hypertonic
c- Isotonic
d- Always hypertonic
Ans: a.

Q16. Energy expenditure in resting state depends upon:
a- Lean body mass
b- Adipose tissue
c- Heart rate
d- None of the above
Ans: a.

Q17. Rise in 2-3 bisphosphoglycerate is seen in all of the subsequent except:
a- Chronic anemia
b- Chronic hypoxia
c- Inosine
d- Hypoxanthine
Ans: d.

Q18. A person sits from standing position, change seen is:
a- Immediate increase in venous return
b- Increase in heart rate
c- Increase epinephrine
d- Increase cerebral blood flow
Ans: a.

Q19. Angiotensin II causes all except:
a- Stimulates release of ADH
b- Increases thirst
c- Vasodilation
d- Stimulates aldosterone release
Ans: c.

Q20. About renal physiology all are actual except:
a- DCT always receive hypo-osmotic solution
b- Afferent artery supplies glomerulus
c- GFR is controlled by afferent and efferent arteriole
d- 5% cardiac output is received by kidney
Ans: d.

Q21. After 48 hours of fasting insulin receptors are down regulated in:
a- Brain
b- Liver
c- RBC
d- Adipocytes
Ans: d.

Q22. actual about deglutition peristalsis of esophagus:
a- Primary
b- Secondary
c- Tertiary
d- Quaternary
Ans: A.

Q23. Oxygen demand of heart:
a- Increases proportionately with heart rate
b- Depends upon duration of systole
c- Is negligible when heart is at rest
d- Is in constant relation with amount of work done
Ans: a.

Q24. Cyanosis doesn’t occur in anemia because:
a- Certain min. amount of decreased Hb should be current
b- In anemia, O2 saturation increases
c- Hypoxia stimulates erythropoietin production
d- O2 hemoglobin curve shifts to right
Ans: a.

Earning:   Approval pending.