Your Pregnant Patient Is in Active Labor

Multiple Choice

Your pregnant patient is in active labor.You note that her contractions are getting closer together and much stronger as the baby moves deeper into the birth canal.The muscle contraction mechanism that moves the baby toward birth is the same mechanism that moves:

A) air down the bronchial tubes to the alveoli.
B) fluid into and out of the cell.
C) sweat to the surface of the skin.
D) food from the esophagus to the stomach.