Read the following four statements (i) - (iv) with certain mistakes in two of them.\ (i) Oxygen pla

Question

Read the following four statements (i) - (iv) with certain mistakes in two of them.\ (i) Oxygen plays less role in regulation of respiratory rhythm.\ (ii) Lungs become empty after forceful expiration.\ (iii) Exchange of gases in the lungs takes place through bronchioles only.\ (iv) Respiratory movements are controlled by $\mathrm{CO}_{2}$ concentration of arterial blood.\ Which of the above two statements have mistakes?\

Professor PC Thomas Classes · Answer

(b) : Approximately $1100-1200 \mathrm{~mL}$ of air remains in the lungs even after a forcible expiration. This is termed as residual volume. Alveoli are the primary sites of gaseous exchange.