Cells were taken while she was being treated for cancer many years ago and these cells have been cultured in the lab ever since.
Just like other cells, the part of the bacterium that is able to interact with its outside environment is its cell membrane. Generally, the main function of the cell membrane is for barrier and protection. This decides which molecules will be allowed to permeate or not. Hope this helps.
I think the answer here is neurons, the nerve cells
They may depend on PH of the water, nutrients, and sunlight.
