BIOG 1440 Lecture 17: Cell to Cell Communication
12 May 2017
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Document Summary
To endure proper physiological responses, cells need to: Achieved by regulating gene expression and protein activities. Protein"s are faster because they already exist. Cells can exchange information and chemicals directly through. Receptor ligand interaction on the cell surface. To coordinate tissue function, secretion based communication of chemical signals. Hormones can have three ranges of action. Hormones, neurotransmitters, and growth factors are chemical signals that are secreted and communicate regulatory messages to receiving cells. Hormones reach all parts of the body but only target cells have receptors for that hormones. Hormones allow to exchange information and modulate cell behavior and activity. They often are key signals in feedback loops that comprise more than one cell type. Feedback system the product is used to regulate the production of that product. Negative and positive feedback loops depends on the effect of the regulation. Negative feedback loops control the output and brings it back to normal (see diagrams in notes)
