BIO 2110 Lecture 12: Lecture 12 - Cell Signaling
2 Mar 2017
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Chemical goes through extracellular fluid, sometimes into environment, pheromones, ethylene. Can be proteins, steroids, all have receptor with preset signal transduction pathway. Chemical messenger, hormone and cytokines (proteins in immune system that act like hormones) Can be made to use or stored before hand. To induce the target cell function through a cascade. Peptides, steroids, amines, lipids, purines, gases and second messengers egca2+ Hydrophilic vs hydrophobic (can diffuse across cell membranes) Greek horme which means that which sets in motion. Substances secreted by cells that control the activities of cell elsewhere in the body. Insulin is both endocrine (into blood) and exocrine (for digestion) Facilitates the uptake of glucose into the cell. The circle is a vesicle, it fuses to membrane to allow uptake of glucose into the cell. Start with cholesterol and then turns into hormones in specific places. Often bound to protein to make control easier. Dimerizes = activated form finds another activated form.
