Epithelial Tissue Flashcards Preview

Histology PHM > Epithelial Tissue > Flashcards

Flashcards in Epithelial Tissue Deck (24):
1

Which 3 places is stereocilia found?

epididymis, inner ear, and ductus deferens

2

State the difference between endothelium and mesothelium

Endothelium lines blood vessels; mesothelium lines the body cavities (pleura, pericardium, and peritoneum)

3

What is the main difference between serosa and mucosa?

Serosa attaches to the basement membrane so is underneath the epithelial cells; mucosa lies on the topmost layer

4

State 3 differences between microvilli and stereocilia

1. microvilli has a villin cap but stereocilia doesn't
2. stereocilia are much longer than microvilli
3. microvilli connects to the plasma membrane via myosin 1; stereocilia connects via ezrin
4. microvilli found in most epithelial cells; stereocilia found in few locations

5

How do stereocilia develop?

1. LATERAL addition of actin filaments
2. elongation of actin filaments

6

State 6 locations of motile cilia.

1. sperm cells as flagella
2. oviduct
3. trachea
4. bronchial tree
5. olfactory
6. brain ependyma (forms lining of brain and spinal cord canal)

7

What are the 2 main functions of motile cilia?

1. transport cell secretions
2. sperm propulsion

8

Which type of cilia on average is the shortest?

primary/monocilia

9

True or false: Primary cilia is motile

false

primary cilia is immotile

10

How are the core microtubules arranged in motile versus primary cilia?

Motile cilia --> 9 + 2 arrangement
Primary cilia --> 9 + 0 arrangement

11

State the function of a basal body.

anchor cilia to apical cell cytoplasm

12

Another name for basal body is ...

microtubule-organizing center

13

Define epithelium

a layer of cells (single or stratified) that lines the external surfaces of body structures and the lumen hollow organs and cavities in the body

14

Function of simple cuboidal epithelium.

secretion and absoprtion

15

True or false: the large intestine has microvilli

False. It's the small intestine

16

Define mesothelium

Epithelium that lines body cavities ex: pericardum, pleural, and peritoneum cavities

17

Mesothelium is what type of epithelium?

simple squamous

18

Define epithelioid tissue

Cells that are closely packed and lack an apical surface

19

Where epithelioid tissue found

adrenal glands parenchyma
corpus luteum cells
interstitial cells of Leydig
Islets of langerhans in pancreas

20

Define parenchyma

The functional part of an organ or tissue

21

Myoepithelium

cells found directly beneath glandular cells above their basement membrane
ex: salivary glands, mammary glands

22

Serosa

a membrane composed of simple squamous epithelium covered by sparse connective tissue, lining the organs and cavities of the body

line body cavities that do not open directly to the outside

23

Adventitia

a layer of loose connective tissue (fibrous and/or adipose) covering the external surface of an organ, serving to hold the organ in place and bind it to adjacent tissues and organs. It has no epithelial layer and no distinct boundary

24

Lamina propria

a thin layer of loose areolar connective tissue, which lies beneath the epithelium and together with the epithelium and basement membrane constitutes the mucosa