Home › NEET UG › biology › Breathing and Exchange of Gases › The actual exchange of O₂ and CO₂ between blood …
The actual exchange of O₂ and CO₂ between blood and air happens at the
Aalveoli of the lungs
Btrachea, where air is humidified
Cbronchi, just below the larynx
Dpharynx, at the back of the throat
Answer & Solution
Correct answer: A. alveoli of the lungs
Alveoli are the dead-ends of the airway tree, with single-cell walls wrapped in capillaries. Gas exchange happens by diffusion across this thin membrane. The trachea, bronchi and pharynx belong to the conducting zone and don't exchange gases.
Related questions
Carbon monoxide poisoning is dangerous because COEmphysema is most commonly caused byThe basic respiratory rhythm is generated in theThe Bohr effect refers to the shift of the O₂-Hb dissociation curve to the RIGHT whenMost CO₂ is transported in the blood asOne haemoglobin molecule can carry a maximum of how many oxygen molecules?Surfactant in the alveoliResidual volume (RV) is