Caused from within. For example, if a manufacturer decides to stop making one product and make another instead, the change is endogenous if the decision is a completely internal one. But if they decide to change because the market for the old product was disappearing, the decision might be endogenous, but the influence would be exogenous (the opposite).
Growing from or on the inside. Developing within the cell. Constituting or relating to metabolism of the nitrogenous constituents of cells or tissues. Arising from internal structural or functional causes.
A term which means coming from inside the body (the opposite of exogenous, which has to do with outside the body). For instance, the hormones produced by the body are said to be endogenous. Hormone supplements added are known as exogenous.
Growing or developing from within an organism. A normally functioning pancreas produces sufficient quantities of insulin. Therefore, this source of insulin is considered an endogenous source. Back to glossary index
Grown or made inside the body. Insulin made by a person's own pancreas is endogenous insulin. Insulin that is made from beef or pork pancreas or derived from bacteria is exogenous because it comes from outside the body and must be injected.