BIOB34H3 Chapter : BIOB30 Ch6 (179-196).docx
Document Summary
Communication, integration, and homeostasis: the nervous system uses chemical and electrical signals for long- distance communication, neurocrine a chemical signal secreted by a neuron that was translated from an electrical signal. Neurotransmitter a neurocrine molecule relesed by neurons that diffuses quickly across a narrow extracellular space to a target cell and has a rapid effect. Neurohormone a neurocrine released by a neuron that diffuses into the blood for distribution: neurohormones and classic hormones blur the line between the nervous and endocrine systems. Most protein or peptide hormones are made and stored in the endocrine cell until needed. 4: signal pathways for cytokines are usually different than hormones, the distinction is blurry though. Receptor proteins are located inside the cell or on the cell. The ligand binding opens or closes the channel altering ion flow across the membrane: receptor-enzymes, g protein-coupled receptors, and integrin receptors.
