alleryStart learning →Gas exchange occurs by which process?
ASimple dilution
BSimple dispersal
CSimple diffusion
DSimple digestion
Answer & Solution
Correct answer: C. Simple diffusion
1. No pump drives gas across the membrane.
2. A partial pressure gradient is enough.
3. Internal respiration occurs as simple diffusion due to a partial pressure gradient.
4. So the answer is simple diffusion.
_Source: OpenStax 'Anatomy and Physiology 2e', Ch 22 'The Respiratory System'_
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