Although there are similarities between bacteria and human cells, there are many differences as well. Antibiotics work by affecting things that bacterial cells have but human cells donât. For example, human cells do not have cell walls, while many types of bacteria do. The antibiotic penicillin works by keeping a bacterium from building a cell wall. Bacteria and human cells also differ in the structure of their cell membranes and the machinery they use to build proteins or copy DNA.
We need to recommend the Oticon Dual XW Hearing Aid, which costs around $4,300. You can find it at discounts of down to $2,800 and you can thus take advantage of wireless technology, superior sound quality and even included Bluetooth connectivity.
The Energizer Zinc-Oxide 1.4-Volt Size 312 Hearing Aid Batteries (8-Pack) features EZ turn-and-lock packaging to keep your unused batteries secure and contain no mercury, making them environmentally friendly. 1  Zinc-Oxide, size 312 batteries. 2  1.4 volts. 3  Intended for use with hearing aid devices.