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question_answer Discussion Board for a Question on Quiz: Biology (WAEC 2001)

50 Questions · Public · Objective · Quiz suitable for all ages

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The effect of the contraction of the muscles of the diaphram is that

Select 1 Option (1 Mks)
  • The volume of the thoracic cavity increases.
  • more carbon dioxide is expelled through the nostrils
  • the rib cage is drawn inwards
  • the intercostal muscle becomes relaxed
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