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.
Photo Credit Jupiterimages/Photos.com/Getty Images. The main difference between spotting and menstruation involves the amount of vaginal bleeding. Spotting is generally seen as intermittent discharge of blood, while periods are three to five days of vaginal bleeding.