Which of the following statement(s) is (are) true about respiration?
(i) During inhalation, ribs move inward and diaphragm is raised
(ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen
(iv) Alveoli increase surface area for exchange of gases
(a) (i) and (iv) (b) (ii) and (iii)
(c) (i) and (iii) (d) (ii) and (iv)

NCERT Class X
Science - Exemplar Problems

Chapter_Life Processes

1

Answers

2015-05-29T16:20:13+05:30
The correct answer is D [2 and 4 ]
in 1st" diaphragm is raised"  is correct but ribs move outward
in 3rd haemoglobin has greater affinity to CO not CO2
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