1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
A
One can breathe out air totally without oxygen.
B
One can breathe out air through Eustachian tube by closing both nose and mouth.
C
One can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all.
D
The lungs can be made fully empty by forcefully breathing out all air from them.
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as
A
bicarbonate in blood plasma and RBCs
B
free CO2 in blood plasma
C
70% carbamino-haemoglobin and 30% as bicarbonate
D
carbamino-haemoglobin in RBCs.
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2
A
acts as a reserve during muscular exercise
B
raises the pCO2 of blood to 75 mm of Hg.
C
is enough to keep oxyhaemoglobin saturation at 96%
D
helps in releasing more O2 to the epithelial tissues.
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The figure given below shows a small part of human lung where exchange of gases takes place. Select the option which represents labelled part (A, B, C or D) correctly identified along with its function. AIPMT 2011 Prelims Biology - Breathing and Exchange of Gases Question 21 English
A
D : capillary wall - exchange of O2 and CO2 takes place here
B
B : red blood cells - transport of CO2 mainly.
C
A : alveolar cavity - main site of exchange of respiratory gases
D
C : arterial capillary - passes oxygen to tissues
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