Which of the following statements are true about respiration?
(i) during inhalation, ribs move inward and diaphragm is raised.
(ii) the gaseous exchange takes place in the alveoli.
(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) alveoli increase surface area of the exchange of gases
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

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Solution

(d) (ii) and (iv)
Statements (ii) and (iv) are correct. The explanation for incorrect statements is given below:
(i) During inhalation, ribs move outward and diaphragm moves downward.
(iii) Haemoglobin has greater affinity for carbon monoxide than oxygen.

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Similar questions

Which of the following statements are true about respiration ?
(i) during inhalation, ribs move inward and diaphragm is raised.
(ii) the gaseous exchange takes place in the alveoli.
(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) alveoli increase surface area for the exchange of gases
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Question 14
Which of the following statement(s) is (are) true about respiration?

(i) During inhalation, ribs move inward and the 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 the blood into the alveolar air.
(iii) Haemoglobin has a 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)

Q. Which of the following statement(s) is (are) true about respiration?

(i) During inhalation, ribs move inward and the 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 the blood into the alveolar air.
(iii) Haemoglobin has a greater affinity for carbon dioxide than oxygen.
(iv) Alveoli increase surface area for exchange of gases.

Q. Which of the following statements are true about respiration?

(i) In plants, respiration happens during the night time only, while photosynthesis happens during the day.

(ii) In humans, the exchange of gases takes place in the alveoli.

(iii) Haemoglobin has a greater affinity for oxygen than carbon dioxide.

(iv) Aquatic organisms use the oxygen in the surrounding atmosphere for respiration.

[0.8 Mark]

Q. Consider the following four statements (i - iv) and select the correct option stating which ones are true (T) and which ones are false (F).
(i) Formation of oxyhaemoglobin occurs at the alveolar surface.
(ii) During gaseous exchange the gases diffuse from high partial pressure to low partial pressure.
(iii) Carbon dioxide cannot be transported by haemoglobin.
(iv) Earthworm respires through parapodia.

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(d) (ii) and (iv) Statements (ii) and (iv) are correct. The explanation for incorrect statements is given below: (i) During inhalation, ribs move outward and diaphragm moves downward. (iii) Haemoglobin has greater affinity for carbon monoxide than oxygen.

(d) (ii) and (iv)
Statements (ii) and (iv) are correct. The explanation for incorrect statements is given below:
(i) During inhalation, ribs move outward and diaphragm moves downward.
(iii) Haemoglobin has greater affinity for carbon monoxide than oxygen.