Question

Read the following four statements (i) - (iv) with certain mistakes in two of them.
(i) A water breather expends much more energy in ventilating its respiratory surface than an air-breathing one.
(ii) Lungs become empty after forceful expiration.
(iii) Exchange of gases in the lungs is interrupted during expiration.
(iv) Respiratory movements are controlled by $C{O}_2$ concentration of arterial blood.
Which of the above two statements have mistakes?

• A. (i) and (iv)
• B. (ii) and (iii)
• C. (i)and(ii)
• D. (iii) and (iv)

Answer 1

The correct option is B (ii) and (iii)

Corrected statements:

(ii) Lungs do not become empty after a forceful expiration.

(iii) The exchange of gases in the lungs is not interrupted during expiration.

So, the correct answer is '(ii) and (iii)'.