cell junctions

Question 1

name 4 types of intercellular junctions

Answer 1

• tight junction
• gap junction
• desmosome
• hemidesmosome

Question 2

where is tight junction found and what is its function

Answer 2

• between lateral membrane
• prevents materials leaking between cells - has to go through cell
• prevents exchange of intrinsic proteins and lipids

Question 3

where is gap junction found and what is its function

Answer 3

• between cells that need to act together eg cardiac myocyte
• small ions can pass through so electrical activity can be coordinated

Question 4

where is desmosome found and its function

Answer 4

• between cells

- cell cell adhesion

Question 5

where is hemidesmosome found and its function

Answer 5

• between basal cells and basal lamina

- connects epithelium to connective tissue