1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is incorrect?
A
The principle of countercurrent flow facilitates efficient respiration in gills of fishes.
B
The residual air in lungs slightly decreases the efficiency of respiration in mammals.
C
The presence of non-respiratory air sacs, increases the efficiency of respiration in birds.
D
In insects, circulating body fluids serve to distribute oxygen to tissues.
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at altitude to 5400 metres have around 8 million. This is because at high altitude
A
people eat more nutritive food, therefore more RBCs are formed
B
people get pollution-free air to breath and more oxygen is available
C
atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
D
there is more UV radiation which enhances RBC production.
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which one of the following has an open circulatory system?
A
Octopus
B
Pheratima
C
Periplaneta
D
Hirudinaria
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Angiotensinogen is a protein produced and secreted by
A
juxtaglomerular (JG) cells
B
macula densa cells
C
endothelial cells (cells lining the blood vessels)
D
liver cells.
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