Biology : XI-CH17 – Breathing and Exchange of Gases – Assertion and Reason

Read the assertion and reason carefully to mark the correct option.

10 Random question from this chapter are displayed, you can take the quiz multiple times to cover all questions

1 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Fishes use tracheal tubes for respiration.

Reason: Fishes are amphibian.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

2 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to the tissues.

Reason: Every 100 ml of deoxygenated blood delivers approx 4 ml of CO2 to the alveoli.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

3 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: 70 per cent of CO2 is carried as bicarbonate ion in plasma.

Reason: If it is transported directly then pH of blood becomes acidic.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

4 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: During inspiration, pressure of air falls in the thorax.

Reason: There is a rise in volume of thorax during inspiration.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

5 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Humans can directly alter the pulmonary volume without change in the volume of thoracic cavity.

Reason: Our lungs are inelastic.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

6 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Gills are highly vascularised

Reason: Gills are used for respiration

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

7 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Functional residual capacity is equal to ERV+RV

Reason: Expiratory capacity is equal to TV+IRV

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

8 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Oxygen dissociation curve is sigmoid.

Reason: Affinity of oxygen for Hb increases with addition of each molecule of oxygen one after another.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

9 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: Fishes respire through lungs

Reason: Amphibians respire through gills

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

10 / 10

Read the assertion and reason carefully to mark the correct option out of the options given below:

Assertion: We have the ability to increase the strength of inspiration and expiration.

Reason: We have some vestigeal abdominal muscles.

Both (A) and (R) are true and (R) is correct explanation of the assertion

Both (A) and (R) are true and (R) is not correct explanation of the assertion

(A) is true but (R) is false

Both (A) and (R) are false

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