Unformatted text preview: • Intracellular chemical signals are produced in one part of a cell and travel to another part of the same cell and bind to receptors. • Intercellular chemical signals are released from one cell, are carried in the intercellular fluid, and bind to receptors in other cells. • Intercellular chemical signals can be classified as autocrine, paracrine, hormone, neurohormone, neuromodulator, neurotransmitter, or pheromone chemical signals. Receptors • Chemical signals bind to receptor sites on receptor molecules to produce a response. • Intracellular receptors are located in the cytoplasm or nuclei and can regulate enzyme activity or regulate the synthesis of specific messenger RNA. • Membrane-bound receptors can produce a response by directly opening ion channels, activating G proteins, or activating enzymes that synthesize intracellular chemical signals, or by phosphorylating proteins inside of the cell....
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.
- Fall '10