Breathing and Exchange of Gases · Question 3

Sponges exchange O2 with CO2 by .

1. gills
2. simple diffusion over their entire body surfaces
3. moist cuticle
4. tracheal tubes

Match List-I with List-II Choose the correct answer from the options given below :

1. A-II, B-IV, C-III, D-I
2. A-II, B-III, C-IV, D-I
3. A-III, B-I, C-IV, D-II
4. A-III, B-I, C-II, D-IV

Match List I with List II: Choose the correct answer from the options given below :

1. A-II, B-IV, C-I, D-III
2. A-III, B-II, C-IV, D-I
3. A-II, B-I, C-IV, D-III
4. A-I, B-III, C-II, D-IV

Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?

1. High pO2 and High pCO2
2. High pO2 and Lesser H+ concentration
3. Low pCO2 and High H+ concentration
4. Low pCO2 and High temperature

Match List-I with List-II: Choose the correct answer from the options given below:

1. A-IV, B-III, C-II, D-I
2. A-II, B-IV, C-I, D-III
3. A-III, B-I, C-IV, D-II
4. A-I, B-II, C-III, D-IV

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. In the light of the above statements, choose the correct answer from the options given below.

1. A is true but R is false.
2. A is false but R is true.
3. Both A and R are true and R is the correct explanation of A.
4. Both A and R are true but R is NOT the correct explanation of A

Vital capacity of lung is .

1. IRV + ERV + TV + RV
2. IRV + ERV + TV − RV
3. IRV + ERV + TV
4. IRV + ERV

Under normal physiological conditions in human beings every 100 ml of oxygenated blood can deliver ml of O2 to the tissues.

1. 2 ml
2. 5 ml
3. 4 ml
4. 10 ml

Which of the following is not the function of conducting part of respiratory system?

1. It clears inhaled air from foreign particles
2. Inhaled air is humidified
3. Temperature of inhaled air is brought to body temperature
4. Provides surface for diffusion of O2 and CO2

Identify the region of human brain which has pneumotaxic centre that alters respiratory rate by reducing the duration of inspiration.

1. Cerebrum
2. Medulla
3. Pons
4. Thalamus