Characteristics and types of epithelial tissue

Question 1

Name the two types of EPITHELIAL tissue

Answer 1

Covering and lining

Glandular

Question 2

Name the four functions of epithelial tissue

Answer 2

1. Protection
2. Absorption
3. Filtration and excretion
4. Secretion

Question 3

What is APICAL-BASAL POLARITY?

Answer 3

A distinct difference in structure between the ‘top’ and ‘bottom’ of cells.

APICAL - top
BASAL- bottom (next to BASEMENT MEMBRANE)

Question 4

What is a TIGHT JUNCTION?

Answer 4

A specialist junction between cells that prevent the passage of proteins

Question 5

What is a DESMOSOME?

Answer 5

Join cells together but can unzip

Question 6

What is a GAP JUNCTION?

Answer 6

A specialist junction that can open and close to allow ions and solutes to pass directly cell to cell

Question 7

What is the BASEMENT MEMBRANE?

Answer 7

An additional BARRIER that is attached to epithelial cells by HEMI-DESMOSOMES

Question 8

Name the layers of the BASEMENT MEMBRANE?

Answer 8

1. BASAL LAMINA

2. LAMINA RETICULARIS

Question 9

Name three characteristics of EPITHELIAL TISSUE

Answer 9

1. Avascular
2. Innervated
3. High regenerative capability

Question 10

What does SIMPLE EPITHELIA mean?

Answer 10

Single cell layer

Question 11

What does STRATIFIED EPITHELIA mean?

Answer 11

Multiple cell layers stacked