L3 - S2

Question 1

till slide 8

Question 2

where can you find epithelial cells
- what are two types and what do they do

REVIEW

Answer 2

• epithelial cells line surface, cativies, and organs
• underneath epithelials there is connective tissue

many types:
* Protective epithelial cell layers on the surface of the organism (skin)
* Absorptive epithelial cells lining a cavity of the organism (digestive tract)

Question 3

slide 10

Question 4

Epithelial structure and function requires junctional complexes

what are junctional complexes?

what are the 4 classes of junctions and what junctions fit in each class?

Answer 4

• REVIEW

1. Tight junctions:
   - tight junction = seals the gap between epithelial cells
2. cell-cell anchoring junctions
   - adherens junction: connects actin filament bundle in one cell