Question: During inhalation, which of the following changes occurs in the thoracic cavity that faclitates at entry Answers: A - D A Expansion of the alveoli and an increase in surface tension B Contraction of the diaphragm and an increase in its dome shape C Relaxation of the intercostal muscles and a decrease in ribcage expansion D Contraction of the trachea and a decrease in its diameter. Need Assignment Help?