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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
Which of the following statements is not true?
  • A
    The partial pressure of oxygen in deoxygenated blood is $40\; mm\; Hg$
  • B
    The partial pressure of oxygen in oxygenated blood is $95\; mm\; Hg$
  • C
    The partial pressure of oxygen in the alveolar air is $104\; mm\; Hg$
  • ✓
    The partial pressure of carbon dioxide in deoxygenated blood is $95\; mm\; Hg$
✓

Answer

Correct option: D.
The partial pressure of carbon dioxide in deoxygenated blood is $95\; mm\; Hg$
d
Each gas in the mixture exerts a part of the total pressure proportional to its concentration, ie, the partial pressure. This is denoted as $p, e \cdot g \cdot, p_{o_{2}}, p_{C O_{z}}$

Partial pressure $( mm\; Hg )$ of respiratory gases

Gas Inspi-red

Air Alve-olar

Air Deoxyg-enated

Blood Oxyge-nated

Blood Exp-ired

Air

$\begin{array}{lllll} O _{2} 158 & 100 & 40 & 95 & 116\end{array}$

$\begin{array}{lllll} CO _{2} 0.3 & 40 & 46 & 40 & 32\end{array}$

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