This preview shows page 1. Sign up to view the full content.
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....
View Full Document
- Fall '10