Histology Lecture (Epithelial Cells) part 2

Question 1

4 types of specialized cell surfaces.

Answer 1

1. Microvilli
2. Stereocilia
3. Cilia
4. Flagella

Question 2

2 Types of shape of Microvilli.

Answer 2

1. Brushed
2. Striated

Question 3

Microvilli: Striated - where can it be found?

Answer 3

Gastro Intestinal Tract (GIT)

Question 4

Microvilli: Brushed- where can it be found?

Answer 4

Proximal Convulated Tubules, Kidney

Question 5

Short or long fingerlike extensions or folds.

Answer 5

Microvilli

Question 6

Vertical striations seen in refractile border of columnar epithelium.

Answer 6

Microvilli

Question 7

Microvilli’s brush borders serves us?

Answer 7

Serve as adaptation to enhance
the surface area of membrane exposed to
substances to be absorbed

Question 8

Longer than microvilli.

Answer 8

Stereocilia

Question 9

Motor detecting

Answer 9

Stereocilia

Question 10

Long non-motile processes of cells projecting in the lumen from each cell in the epithelium of epididymis.

Answer 10

Stereocilia

Question 11

Like hair of a water color brush

Answer 11

Stereocilia

Question 12

Longer branched microvilli

Answer 12

Stereocilia

Question 13

Its function is not well established but in the epithelium, it is absorptive.

Answer 13

Stereocilia

Question 14

Assumed that it promotes its function by
amplifying the cell surface

Answer 14

Stereocilia

Question 15

Where can stereocilia can be found?

Answer 15

• Inner ear
• Epididymis
• Male reproductive tract
• Part of ductus deferens

Question 16

Numerous motile processes larger than
microvilli.

Answer 16

Cilia

Question 17

Arranged in parallel rows projecting from surfaces of some epithelial cells.

Answer 17

Cilia

Question 18

At the base of cilia is dense elongated granule called?

Answer 18

Basal Body

Question 19

Moves in waves and sweep over epithelium.

Answer 19

Cilia

Question 20

Surfaces serve to propel fluid or coating of mucus towards the exterior.

Answer 20

Cilia

Question 21

Elongated motile structure on surface of epithelial cells, longer than cilia.

Answer 21

Flagella

Question 22

How does flagella differ from cilia?

Answer 22

They differ in movements and the number of cells.

Question 23

What is the largest flagella?

Answer 23

Mammalian Spermatozoa

Question 24

Where can flagella be found?

Answer 24

• Epithelia of Nephrons
• Testes
• Ducts of glands

Question 25

Varied in shape, from high columnar to cuboidal to low squamous cells including all intermediate forms.

Answer 25

Epithelial Cells

Question 26

What is the form of epithelial cells? Why is it like that?

Answer 26

- Polyhedral form - This is due to their position in cellular layers

Question 27

What is the shape of the nuclei of epithelial cells.

Answer 27

- spherical or elongated. - They correspond to the shape of the cell.

Question 28

In cuboidal cell, what is the shape of the nuclei?

Answer 28

spherical

Question 29

In squamous cell, what is the shape of the nuclei?

Answer 29

flat

Question 29

Long axis of the nucleus is always __________ to the main axis of the cell.

Answer 29

parallel

Question 30

Classification of Epithelial Tissue in accordance to complexity or number of layers.

Answer 30

1. simple 2. stratified 3. pseudostratified 4. transitional

Question 31

Classification of Epithelial Tissue in accordance to shape

Answer 31

1. squamous 2. cuboidal 3. columnar

Question 32

Types of simple epithelial cells

Answer 32

1. simple squamous epithelium 2. simple cuboidal epithelium 3. simple columnar ciliated epithelium 4. simple columnar non-ciliated epithelium 5. pseudostratified columnar ciliated epithelium 6. pseudostratified columnar stereociliated epithelium

Question 33

Types of stratified epithelial cells

Answer 33

1. stratified squamous keratinized epithelium 2. stratified squamous non-keratinized epithelium 3. stratified cuboidal epithelium 4. stratified columnar epithelium 5. transitional epithelium 6. glandular or pyramidal epithelium