Multiple choice

Contractions of the external intercostal muscles bring about

  1. decrease in the volume of thoracic cavity

  2. increase in the volume of thoracic cavity

  3. volume of thoracic cavity does not change

  4. flattening of the diaphragm

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

Contractions of the external intercostal muscles bring about increase in the volume of thoracic cavity.