I would say that support is crucial, especially family support for people with eating disorders. For example, those people who are under a lot of stress may eat too much and thus gain too much weight, whereas those who are depressed may eat too little so lose weight and both conditions can be helped by moral support and helping the afflicted person seek help as in medical help, massage, energy healing etc to help relieve their stress.
Smooth muscles depolarize as a result of a transmembrane current of Calcium ions. When an action potential depolarizes the muscle cell membrane, it also travels into the body of the cell via the t-tubules. Unlike skeletal muscle, smooth muscle is dependent in two sources of calcium in order to intiate contraction. These two sources are calcium sequestered in the S.R. of the smooth muscle cell.
Oxygen is the answer for this question.
