Calcium is unique among metals because its ions have a very large concentration gradient across the plasma membrane of all cells, from 10 â3 M Ca 2+ outside, to 10 â7 M Ca 2+ inside.
Originally Posted by Quinne. I think it has a lot to do with motives.... What I learned through studying Alcohol & other Drug work is that in counselling terms, a lapse is a hiccup and a relapse is full-blown return to old behaviours, as well as active addiction.
PPMS progresses once symptoms start to present, hence the name primary progressive. There may be periods of active progression and then periods of inactive progression of symptoms and disability. What differentiates PPMS from the relapsing forms is that while active progression may stop temporarily, the symptoms do not resolve.