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.
central diabetes insipidus â insufficient production or secretion of ADH; can be a result of damage to the pituitary gland caused by head injuries, genetic disorders, tumors, surgery, and other diseases.