(3 of 10) Contraction of the internal intercostals contributes to ------------------ of air. O Inspiration O Expiration O Stabilization
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When considering the inspiration/expiration cycle that occurs with pulmonary ventilation, the internal intercostal muscles have a role in the process of expiration while external intercostals are important in the process of inspiration.
Adi S.
Use the word inspiration or expiration to describe the part of the breathing cycle that occurs as a result of each of the following: a. The diaphragm contracts (flattens out). b. The volume of the lungs decreases. c. The pressure within the lungs is less than that of the atmosphere.
Gases
Pressure and Volume (Boyle's Law)
When the diaphragm and internal intercostal rib muscles contract air pressure in the thoracic cavity increases that causes expiration air pressure in the thoracic cavity decreases that causes expiration air pressure in the thoracic cavity decreases, causing inspiration air pressure in the thoracic cavity increases that causes inspiration
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