Cell Junctions Flashcards
Cell junctions are mainly found in
Epithelial tissues
Tight junctions are typically found in
- Bladder
- Kidney
- Intestines
Desmosomes are
Connections attached inside the cytoskeleton
Desmosomes allow for the
Flow of ions and water through gaps
Desmosomes are found in
Stressed-tissues (skin and intestines)
Gap junctions are
Tunnels in between cells
What is the function of Gap Junctions?
They allow for the flow of water and ions between cells
Gap Junctions are found in
Tissues / cells that spread AP (like cardiac tissues + neurons)
Gap junctions act like
Pipes between cells
Macula adherens and desmosomes are
Protein connections between cells
What is another name for tight junction?
Zonula occludens
In cardiac muscle cells, intercalated discs permit
The movement of ions between cells
Most membrane receptor proteins like G protein-coupled receptors and receptor tyrosine kinases are activated by
A single specific ligand
Voltage-gated ion channels open once a
Sufficient electrical potential difference has formed across the membrane
A second messenger propagates the signal initiated by the first messenger from the
Plasma membrane to the rest of the cell’s interior
