What you would expect to hear is a polyphonic high-pitched wheeze which can usually be heard at the end of exhalation. But take note that the intensity of the wheeze is not a good indicator for severity. Usually, when there is severe airway obstruction, the lungs are actually silent upon auscultation.
Energy in the initial form of glucose is used with oxygen to produce carbon dioxide, water and energy in the form of ATP which is taken up by the cell in order to perform cellular processes.