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.
(January 2010). Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.Redirected from Endocrine glands). Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.