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.
The adrenal glands are tiny organs that rest on top of each kidney. Despite their small size, the adrenal glands play an important role in the body, producing numerous hormones that impact our development and growth, affect our ability to deal with stress, and help to regulate kidney function.he medulla, or inner part of the adrenal glands, produces the hormones norepinephrine and epinephrine, which regulate the fight or flight response in the body, the body's reaction to stressful events.