BI110 Lecture Notes - Lecture 17: Extracellular Fluid, Paracrine Signalling, Blood Sugar
Document Summary
Describe different ways cells can communicate with each other. Compare and contrast receptor types found in cells. Explain how enzyme-linked receptors lead to signal transduction. Explain how activation of a g protein-coupled receptor leads to signal transduction. Underlying mechanism used by cells to share information is: produces cellular responses to extracellular signals. Chemical cell signaling in multicellular eukaryotes involves information exchange between neighboring cells as well as with those farther away. Numerous chemicals are involved in cell communication: cells that respond to a stimulus are called sensory cells. These cells secrete ligands: signaling molecules that bind directly to receptors on target cells to produce biological responses. In humans (animal cells), gap junctions provide transmission between adjacent cells; pores in the cell membrane that allows cells to share molecules and ions: the nervous system plays a key role in multicellular animals, downstream activation.
