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.
5. Get help from a doctor now âº. Endocrine gland: The adrenal glands sit on top of the kidneys and their main function is to make hormones. The adrenal glands make hormones in response to stress (cortisol, epinephrine), hormones that affect kidney function and blood pressure (aldosterone), and sex hormones (androgens).. Get help from a doctor now âº. Endocrine gland: The adrenal glands sit on top of the kidneys and their main function is to make hormones. The adrenal glands make hormones in response to stress (cortisol, epinephrine), hormones that affect kidney function and blood pressure (aldosterone), and sex hormones (androgens).