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PART - 2 - Unit V : CH - 14 Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPART - 2 - Unit V : CH - 14 Breathing and Exchange of Gases1 Mark
MCQ
During exhalation:
  • A
    diaphragm and external intercostal muscles are contracted
  • ✓
    diaphragm and external intercostal muscles are relaxed
  • C
    only diaphragm is relaxed
  • D
    none of the above
✓

Answer

Correct option: B.
diaphragm and external intercostal muscles are relaxed
B

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