Building Tissues From Cells

Question 1

Do blood vessels pass through epithelial cells?

Answer 1

No. Depend entirely on diffusion

Question 2

3 cell shape

Answer 2

Squamous
Cuboidal
Columnar

Question 3

3 layer structures

Answer 3

Simple
Pseudostratified
Stratified

Question 4

8 types of exocrine glands

Answer 4

1. Simple acinar
2. Branched acinar
3. Compound acinar
4. Simple tubular
5. Branched tubular
6. Compound tubular
7. Coiled tubular
8. Tubulo-acinar

Question 5

3 types of exocrine secretions

Answer 5

1. Apocrine : part of apical cytoplasm is lost eg mammary
2. Merocrine: exocytosis eg salivary
3. Holocrine: entire cell breaks down

Question 6

2 Anchoring cell junctions. What’re they made of. Other function

Answer 6

Desmosome (cell-cell): cadherin (transmembrane adhesion protein) + intracellular anchor proteins (keratin+cytoplasmic plaque)
Hemidesmosome (cell-BM): intracellular anchor proteins + transmembrane adhesion protein

Allow flexing of cell sheets

Question 7

Adherents junction components

Answer 7

Cadherin dimer + actin filament

Question 8

Tight junction components and function

Answer 8

Claudin + occludin

Prevents leakage of molecules between cells

Question 9

GAP junction components and function

Answer 9

Made of connexons 
6 connexins (2 types) make 1 connexon (homomeric/heteromeric)
2 connexons make 1 intracellular channnels (homotypic/heterotypic)