The production of ATP in mitochondria . a. requires oxygen

b. takes place in the outer layer of mitochondria

c. is anaerobic

d. takes place in eukaryotic and prokaryotic cells

e. is directly responsible for beginning the process of making ribosomal RNA

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.