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Question 14: Which of the following statement(s) is (are) true
Science Exemplar
Science Exemplar

Class 10

NCERT Exemplar

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NCERT
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Question 13: Which of the following is most appropriate for aerobic respiration?
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Question 14: 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.
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Question 15: Which is the correct sequence of air passage during inhalation?
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Question

Question 14: 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)

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Question 14: 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.
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Answer:
During inhalation, ribs move outward and the diaphragm is flattened. Alveoli act as a site of exchange of gases by diffusion and also they increase the surface area for the same.
Hence, the correct answer is option D.
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Question Text
Question 14: 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.
TopicLife Processes
SubjectScience
ClassClass 10
Answer TypeText solution:1
Upvotes36