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  • Respiration in Plants and Animals
  • Contraction of the external intercostal muscles brings about
Multiple choice

Contraction of the external intercostal muscles brings about

  1. decrease in volume of thoracic cavity

  2. increase in volume of thoracic cavity

  3. no change in volume of thoracic cavity

  4. flattening of the diaphragm

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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