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.
Either diabetes insipidus or diabetes mellitus; term refers to a condition in which the pituitary gland increases urinary output (diabetes insipidus) or a defect in insulin production or action, thus inducing hyperglycemia (diabetes mellitus).