alleryGases cross from alveoli to blood mainly by:
ASimple diffusion
BActive transport
COsmotic flow
DBulk filtration
Answer & Solution
Correct answer: A. Simple diffusion
1. No energy is spent moving the gases.
2. They follow a pressure gradient.
3. That is simple diffusion.
_Source: syllabus Biology, Chapter 17, Breathing and Exchange of Gases._
Keep practising Breathing and Exchange of Gases
Browse all Breathing and Exchange of Gases questions for AP Intermediate 1st Year, or explore more Biology topics.
Related questions
Which cartilaginous part of the airway is called the sound box?During swallowing, which flap covers the glottis to keep food out of the larynx?Frogs can respire through their moist skin. This is known as:Respiration using vascularised gills, as in most aquatic arthropods, is called what?Earthworms exchange respiratory gases mainly through which structure?Breathing bingoWhich is biggerHow each gas travels