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.
Endocrine System Endocrine Glands-unlike exocrine glands (which secrete their secretory products into ducts), endocrine gland secrete their products directly into the blood.- Some glands have both an endocrine and exocrine function and are termed heterocrine glands.Some heterocrine glands we will study are: - pancreas-ovaries-testes. 77. Effects of Hormones 1. regulates chemical composition of extracellular fluids.ndocrine System Endocrine Glands-unlike exocrine glands (which secrete their secretory products into ducts), endocrine gland secrete their products directly into the blood.