An older adult client reports pain in the ears and an unusual sense of fullness. the client also indicates not hearing as well as in the past. on inspection, the nurse notes that there is an accumulation of earwax in the client's ears. the client is suffering from:

Based on the salient features of this patient namely the pain in the ears, unusual sense of fullness, as well as hearing loss which is most likely conductive hearing loss; with a physical examination finding of an "accumulation of earwax", then the most likely impression for this case is impacted cerumen. Impacted cerumen happens when the cerumen gets accumulated inside the ears, hardens, and blocks the conduction of sound; preventing sound waves from being conducted to the ear drum. This also causes pain and ear fullness as the hardness of the cerumen may produce inflammation.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.