Delete Content. A plasma membrane is permeable to specific molecules that a cell needs. Transport proteins in the cell membrane allow for selective passage of specific molecules from the external environment. Each transport protein is specific to a certian molecule (indicated by matching colors).
The pancreas contains cells which release both insulin and glucagon. The endocrine system consists of a number of different glands which secrete hormones that dictate how cells and organs behave.
2.Both are characterized by frequent urination and excessive thirst, but in diabetes mellitus, urination is less frequent. 3.Diabetes mellitus is caused by the deficiency of insulin, and diabetes insipidus is caused by the deficiency of vasopressin secreted by the pituitary gland.