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.
Possible causes include congenital issues, trauma, metabolic conditions, kidney disease, adverse reactions to certain medications, or tumors of the pituitary gland. Despite the underlying cause of diabetes insipidus, the symptoms are the same. They include: 1  Increased thirst/urination (polydipsia/polyuria). 2  Dehydration. 3  Disorientation. 4  Seizures. 5  Diluted urine.