Lecture 1 & 2 Cell Signaling

Cell Junction

are specialized strucutres comprised of many different protiens that hold cells together

Tight Junction

from the tight seals (barrier) between cells, which helps ensure directional movement of material

Gap Junction

form “tunnels” called channels so that adjacent cells can communicate by exchanging small molecules, electrical impulses, ect

Desmosomes

hold cells together like velcro; also allows material to move around in the intracellular space

• ________ link adjacent cells tightly but permit materials to move around them in the intracellular

The Extracellular matrix (ECM)

is a macromolecule-rich gel outside of cells

• cells can move within a tissue by binding and reattaching of adhesion receptors to the ________

• This is important for cells movement within developing embyos and for the spread of cancer cells

Integrals

are one type of adhesion receptors that can facilitate movement by binding and attaching to the extracellular matrix

• All cells processes information from the environment when a ligand binds a receptor

Receptor

• All cells processes information from the enviorment when a ligand binds a ______

• To respone to a signals a cell must have a specific ____ molecules that can detect it