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STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
In humans, exchange of gases occurs
  • A
    By diffusion
  • B
    Between blood and tissue
  • C
    Between alveoli and pulmonary blood capillary
  • ✓
    All of the above
✓

Answer

Correct option: D.
All of the above
d
Alveoli are the primary site of exchange of gases. Exchange of gases also occur between the blood and tissue. $O_{2}$ and $C O_{2}$ are exchanged in these sites by simple diffusion, mainly based on pressure concentration gradient Pressure/Concentration gradient, solubility of gases as well as the thickness of the membranes involved in diffusion are some important factors that affects the rate of diffusion

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