Cell Junctions Flashcards
1
Q
What are the three types of cell junctions?
A
Tight junctions
Desmosomes
Gap junctions
2
Q
What do tight junctions connect?
A
Adjacent epithelial cells
3
Q
Where are tight junctions found?
A
Epithelium lining the intestine
4
Q
What do desmosomes do?
A
Hold cells together and strengthen connections of adjacent cells
5
Q
Where are desmosomes found?
A
Between epithelial cells that need to withstand physical stress (eg skin)
6
Q
Where are gap junctions found?
A
Between adjacent cells (communication junctions)
7
Q
How are desmosomes formed?
A
Interlocking proteins that are resistant to twisting and stretching
8
Q
How do gap junctions work?
A
Proteins called connexons form small channels that allow ions and small molecules to move between cells
