Topic 8 - The epithelial cell: The polarity of the epithelial cell

Question 1

Layers

Answer 1

Apical
Lateral
Basal

Question 2

Apical

Answer 2

-faces comparement, can contain microvilli or cilia (respiration)

Question 3

Lateral

Answer 3

-Neighbours other cells, membranes can fuse to increase absorbancy

Question 4

Basal

Answer 4

-Faces basal lamina, can contain mitochondria filles basal structures-

Question 5

Two plasmamembranes domains:

Answer 5

Apical and basolateral(facing blood supply surfaces).

They have different lipid and protein composition

Question 6

Connections

Answer 6

Thight junctions, gap junctions, belt desmosome

Question 7

Thight junctions

Answer 7

bw. cells forming impermeable/semi-permeable barriers bw cells.

Question 8

Gap-junctions

Answer 8

allow passage of electrolytes and other molecules bw cells

Question 9

Belt desmosome

Answer 9

hold cells togheter with filaments

Question 10

Cilia

Answer 10

Membrane specialization of the basal membrane surface of apical cells of epithelial cells: basal strition + basal lamina