What happens when you take a deep breath in then forcibly blow out the candles of your birthday cake? Check all that apply.
a) Intercostal muscles expand the chest, and the diaphragm flattens during inspiration.
b) Intercostal muscles and the diaphragm simply relax as you blow out the candles.
c) Intercostal muscles and the diaphragm contract as you blow out the candles.
d) The parietal pleura pulls on the visceral pleura because of the surfactant between them.
e) The phrenic nerve controls the diaphragm.