Epithelium 2

Question 1

Classification of epithelial tissues

Answer 1

1. Covering and lining (simple and stratified)
2. Glandular epithelium
3. Sensory/neuroepithelium
4. Myoepithelium

Question 2

Structure of simple squamous

Answer 2

Formed of flattened cells and nucleus

Question 3

Where is the simple squamous structure found?

Answer 3

It lines the body cavities
1. Pleural
2. Pericardial
3. Peritoneal
4. Bowmans capsule

Question 4

Function of simple squamous

Answer 4

Gives smooth surface and prevents friction
Facilitates filtration

Question 5

Simple cuboidal structure

Answer 5

Looks like squares in a CS
Spherical large nucleus

Question 6

Where is the simple cuboidal structure found?
And function

Answer 6

Thyroid follicles—> provides secretory function
Renal tubule —> microvilli on the cell surface provides reabsorption

Question 7

Simple columnar structure

Answer 7

Elongated cells with basal oval nucleus
Can be ciliated or non ciliated

Question 8

Sites and function of simple columnar tissues

Answer 8

• secretory: secrets mucus in the stomach and colon
  *absorptive: lining of the small intestine
• excretory: ciliated found in the uterine tubes and uterus

Question 9

Pseudostratified columnar epithelium structure

Answer 9

Tall: reach the surface (secretory goblet cells or ciliated cells)
Short: progenitor cells which differentiate to form cells replacing the tall ones

Question 10

Sites of pseudostratified columnar epithelium

Answer 10

*non ciliated: vas deferens
*ciliated: lines the respiratory tract

Question 11

Stratified epithelium: general structure + types of superficial layers

Answer 11

*general structure: formed of more than one layer
*Types: 1.Stratified squamous (keratinized and non keratinized)
2. Stratified columnar
3.transitional epithelium

Question 12

Function of the stratified squamous non keratinized epithelium

Answer 12

Serves as a protective membrane on wet surfaces that are subjected to mechanical tearing

Question 13

Sites of the stratified squamous non keratinized epithelium

Answer 13

Lining of the buccal cavity (esophagus)

Question 14

Function of the stratified squamous keratinized epithelium

Answer 14

Covers dry surfaces
Keratinizing protects the body from dryness and harmful agents
(The outermost layer contains keratin)

Question 15

Sites of the stratified squamous keratinized epithelium

Answer 15

Skin

Question 16

Structure, function and site of the stratified columnar epithelium

Answer 16

*structure: formed of basal columnar cell layer + layer of polyhedral cells
*funtion: protective layer
*site:lines the large ducts of glands

Question 17

Structure of transitional epithelium

Answer 17

*rounded when empty
*squamous when full

Question 18

Function of transitional epithelium

Answer 18

Withstands the hypertonic effects due to a specialized membrane
Protect underlying cells from toxic solutions

Question 19

Site of transitional epithelium

Answer 19

Urinary tract