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.
diabetes insipidus. a metabolic disorder caused by a deficiency in the secretion of antidiuretic hormone (ADH) by the posterior pituitary gland, characterized by large amounts of urine and sodium being excreted from the body.