Biology 2601A/B Lecture Notes - Lecture 19: Prolactin, Cell Adhesion Molecule, Melatonin
17 Dec 2017
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Chemical communication scale: animals can communicate chemically on a range of scales. Communication between cells: ions transfers through gap junctions ion passing is sending signal. Neurotransmitters is moving up one level cells can communicate with each other through them (ex: nerve cell sending neurotransmitter indirectly to communicate with a muscle cell. Paracrines (chemicals that allow communication between cells that are close together) and autocrines. As we go to a higher level and more distance, we talk about hormones (chemicals released into the circulatory system and travel into the effect organ, which may be a bit far) A scale of communication that is even higher is among animals (rather than within its body) Chemical released by one animal is sensed by another which causes change in behavior. Cell adhesion molecules (ex: development of mammary glands during pregnancy) Exocrine gland secrete into environment or body cavities, usually through duct (tube that connects the gland to the final destination)
