The partial pressure of and in the arterial blood respectively is
1. 40 mmHg and 45 mmHg
2. 100 mmHg and 45 mmHg
3. 95 mmHg and 40 mmHg
4. 45 mmHg and 40 mmHg
The partial pressure of carbon dioxide in the pulmonary artery is
1. More than that in tissues
2. Equal to that in systemic arteries
3. Less than that in alveoli
4. Equal to that in the systemic vein
Emphysema is a chronic disorder, it leads to
(1) Loss of elasticity of walls of bronchioles and
alveoli
(2) Surface area of exchange of gases is
increased
(3) Alveolar sacs become empty even after
expiration
(4) Exhalation becomes easier during inflation of
lungs
In the human body, CO2 is primarily carried in blood as
1. Dissolved in plasma
2. Carbaminohaemoglobin
3. Sodium bicarbonate
4. Potassium carbonate
Vital capacity is
1. RV + TV + IRV
2. ERV + RV
3. TV + ERV + RV
4. ERV + TV + IRV
Choose the correct sequence during expiration
(i) Pressure increases in pulmonary cavity
(ii) Volume of thoracic cavity decreases
(iii) Expulsion of air from high pressure to low pressure
(iv) Decrease in volume of pulmonary cavity
1. i ii iii iv
2. iv i iii ii
3. ii iv i iii
4. iii iv i ii
Inspiration can occur if pressure is less than atmospheric pressure, i.e., there is pressure in the lungs with respect to atmosphere pressure. Choose the option that fills the blanks correctly.
A B
1. Intra-pulmonary Positive
2. Intra-pulmonary Negative
3. Inter-pleural Positive
4. Intra-pleural Positive
Factors which can cause right shift in oxyhaemoglobin curve include all except
1. Increase in pCO2
2. Decrease in pO2
3. Increase in pH
4. Increase in H+ concentration
Match the items given in Column I with those in Column II and select the correct option given below.
Column-I Column-II
a. Inspiratory capacity (i) IRV + EC
b. Vital capacity (ii) TV + IRV
c. Residual volume (iii) TLC –VC
d. Functional residual (iv) TLC – IC
capacity
(1) a(i), b(ii), c(iv), d(iii)
(2) a(iii), b(i), c(ii), d(iv)
(3) a(i), b(iii), c(ii), d(iv)
(4) a(ii), b(i), c(iii), d(iv)
Excessive cigarette smoking leading to damage of alveolar walls is associated with
1. Asthma
2. Emphysema
3. Silicosis
4. Botulism