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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
Rate and depth of respiration shall increase when
  • A
    Oxygen concentration increases
  • ✓
    $C{O_2}$ concentration increases
  • C
    $HC{O_3}$ concentration increases
  • D
    $HC{O_3}$ concentration decreases
✓

Answer

Correct option: B.
$C{O_2}$ concentration increases
b
(b) Activity of respiratory centres is directly proportional to the level of free $C{O_2}$ in blood.

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