Endogenous

Definition

Endogenous refers to processes, substances, or actions that originate from within an organism, cell, or system. In the context of the autonomic nervous system, it emphasizes internal sources of signals or changes rather than those coming from external environmental factors.

Related terms

Neurotransmitters: Chemical messengers that transmit signals across a chemical synapse from one neuron (nerve cell) to another target neuron, muscle cell, or gland cell.

Homeostasis: The process by which organisms maintain a stable internal environment despite changes in the external environment.

Sympathetic Nervous System: A division of the autonomic nervous system responsible for the body's 'fight or flight' response during perceived threats