Question 1: Which of the following is the best known metabolic function of the lung ?
A) Inactivation of serotonin
B) Conversion of angiotensin-I to angiotensin-II
C) Inactivation of bradykinin
D) Metabolism of basic drugs by cytochrome P-450 system
Answer:
B
Question 2: When the aviator is subjected to negative G ?
A) The hydrostatic pressure in veins of lower limb increases
B) The cardiac output decreases
C) Black out occurs
D) The cerebral arterial pressure rises
Answer:
C
Question 3: The normal value of P50 on the oxyhaemoglobin dissociation curve in an adult is ?
A) 1.8 kPa
B) 2.7 kPa
C) 3.6 kPa
D) 4.5 kPa
Answer:
C
Question 4: Which combination of the following statements is correct with reference to hypoxia ?
1) When it is severe, causes stimulation of the sympathetic nervous system
2) It leads to the accumulation of hydrogen and lactate ions
3) It causes decreases in cerebral blood flow
4) If it is chronic, causes rightward shift of oxygen Hb curve
A) All of the above statements are correct
B) 2 & 3
C) 1, 2, & 4
D) 2, 3 & 4
Answer:
Question 5: Examine the shape of the flow volume curve carefully
This flow volume loop indicates one of the following ?
A) Normal
B) Extrathoracic obstruction
C) Intrathoracic obstruction
D) Fixed large airway obstruction
Answer:
A
Question 6: During the dark phase of visual cycle, which form of vitamin A combines with opsin to make Rhodopsin ?
A) All trans - Retinaldehyde
B) All trans - Retinol
C) 11 - cis - retinaldehyde
D) 11 - cis - Retinol
Answer:
Question 7: The following interleukin is characteristically produced a THl
response ?
A) IL - 2
B) IL - 4
C) IL - 5
D) IL - 10
Answer:
A
Question 8: Erythropoiesis is promoted by all of the following except ?
A) ACTH
B) Thyroxine
C) Oestrogen
D) Prolactin
Answer:
Question 9: When does switchover from fetal to adult hemoglobin synthesis begin ?
A) 14 weeks gestation
B) 30 weeks gestation
C) 36 weeks gestation
D) 7 – 10 days postnatal
Answer:
B
Question 10: If a single spinal nerve is cut, the area of tactile loss is always greater than the area of loss of painful sensations, because ?
A) Tactile information is carried by myelinated fast conducting fibres
B) Tactile receptors adapt quickly
C) Degree of overlap of fibres carrying tactile sensation is much less
D) In the primary sensory cortex tactile sensation is represented on a larger area
Answer:
Question 11: Massage and the application of liniments to painful areas in the body relieves pain due to ?
A) Stimulation of endogenous analgesic system
B) Release of endorphins by the first order neurons in the brain stem
C) Release of glutamate and substance P in the spinal cord