BIOL 117 Lecture Notes - Lecture 8: Tight Junction, Lipid Bilayer, Chemical Polarity
Document Summary
Many types of structures connect neighboring cells: tight junctions, desmosomes, gap junctions, adherent junctions Be able to differentiate between these different junctions and learn what kinds of tissues they are associated with. Signaling from outside to inside the cell: in order to get signals inside the cell. If it"s a polar molecule, it"ll attach to receptors on the outside of the cell and then use secondary messengers to send the message. If it"s a non polar molecule, it will pass through the lipid bilayer and attach to receptors within the cells: steps of cell-cell signaling. 4. signal deactivation: lipid soluble signals are processes directly. 2. signal reception: receptors may be in the cytoplasm, but may also be within the nucleus itself, most of the time receptors will bind to dna and change something in transcription. 3. signal response: the type of response depends on the type of signal, lipid insoluble signals require transduction.
