DSA 1: Classifying Epithelial Tissue Flashcards Preview

HDM Midterm > DSA 1: Classifying Epithelial Tissue > Flashcards

Flashcards in DSA 1: Classifying Epithelial Tissue Deck (45):
1

What is the basis for epithelial polarity?

Organelles and proteins are unevenly distributed

Difference in structure and function based on basal domain, apical domain, and lateral surfaces

2

What type of epithelium would you find in blood vessels (endothelium) and the lining of serous membranes (mesothelium)?

Simple squamous

3

What type of epithelium would you find in kidney tubules, glands and ducts, terminal bronchioles, and covering the ovaries?

Simple cuboidal

4

What type of epithelium would you find lining the alveoli of the lungs, loop of Henle in the kidney, and in various ducts?

Simple squamous

5

What type of epithelium would you find in some glands and ducts, auditory tubes, uterus, oviducts, stomach, intestines, gallbladder, and bile ducts?

Simple columnar

6

What type of epithelium would you find lining the nasal cavity, pharynx, trachea, and bronchi?

Pseudostratified columnar ciliated

7

____________ are apical extensions similar to cilia but they lack microtubules

Stereocilia/stereovilli

8

What type of epithelium is found in urinary bladder, ureters, and urethra?

Urothelium

9

What type of epithelium is found in the mouth, oropharynx, laryngopharynx, esophagus, anus, vagina, urethra, and cornea?

Nonkeratinized stratified squamous

10

What differentiates nonkeratinized stratified squamous tissue from keratinized stratified squamous tissue?

Nonkeratinized stratified squamous retain their nuclei and orgnalles in the apical layer while keratinized do not

11

What type of epithelium would you find in sweat glands and ducts, ovarian follicles, and salivary gland ducts?

Stratified cuboidal

12

What are the 4 types of apical specializations?

Cilia
Flagella
Microvilli
Stereocilia

13

Cilia are mobile projections comprised of ______________.

They are extensions of the ___________, and the basal body core anchors extended cilia.

Microtubules

Cytoskeleton

14

Cilia beat in a wave-like fashion to propel substances across the tissue, like ________, _______, or debris

They are up to 10mm long and up to 300+ may be present.

Mucous; oocytes

15

Which apical specialization is specialized for absorption and forms the brush border?

Microvilli

16

___________ are long, non-motile, microvilli

Stereocilia

17

What provides rigidity to stereocilia?

Actin core

18

Where would you find stereocilia?

Male reproductive tract
Inner ear

19

What 2 proteins are associated with tight junctions?

Claudin
Occludin

20

Tight junctions encircle cells near their most _______ surface. Molecules may pass through cells, but not in between

Apical

21

What is another name for tight junctions

Zonula occludens

22

Zonula adherens junctions contain __________ and ________ proteins which bind to ________ filaments

Cadherin; catenin; actin

23

Zonula adherens junctions encircle the _____ surface of cells and are ______ to the tight junction

Apical
Deep

24

What is another name for zonula adherens?

Adhering junctions

25

___________ junctions are fluid-filled channels that connect apposed cells and mediate communication

Gap

26

What proteins are associated with gap junctions?

Connexin aggregates

27

___________ are thickened plaques located at sites of mechanical stress and provide strength and rigidity

Desmosomes

28

What proteins are associated with desmosomes?

Cadherins, which bind to intermediate filaments

29

What is another name for desmosomes?

Macula adherens

30

Cadherin:cadherin junctions bind __________

Intercellularly

31

________ anchor epithelial cells to underlying basal lamina

Hemidesmosomes

32

What proteins are associated with hemidesmosomes?

Integrins and intermediate filaments

33

__________ _________ is a specialized sheet of extracellular material that acts as a selective barrier between tissues and permits diffusion of nutrients

Basement membrane

34

With ________ glands, the gland product is released onto the surface

With ________ glands, the gland product is released into the blood

Exocrine

Endocrine

35

_________ cells are unicellular glands that synthesize and secrete mucous (mucin). They are scattered throughout epithelia

Goblet

36

What type of epithelial cell is a goblet cell?

Modified columnar

37

Which portion of an exocrine gland is the secretory portion?

Acinus

38

Which portion of an exocrine gland is the conducting portion?

Duct

39

The duct system of a gland may be simple or _________.

The acinar component may be ________or acinar.

Compound

Tubular

40

Where would you find mesothelium and what type of epithelium is it?

Peritoneum
Pleura
Pericardium

Simple squamous

41

Goblet cells are often present among the ________ epithelial cell. They can be distinguished by a dilated, goblet-like apical cytoplasm containing mucous material.

Mucous is released into the lumen and coats epithelial cell surfaces.

The _______ ________ consists of loose CT located beneath the epithelium

Lamina propria

42

Pseudostratified columnar epithelium consists of what 3 major cell types?

Columnar cells with apical cilia

Basal cells anchored to basal lamina

Goblet cells between basal lamina and lumen

43

What are the 2 major cell types of the epididymal epithelium?

Columnar cells with stereocilia

Basal cells attached to lamina

44

What 3 cell types make up the urothelium?

Dome-shaped superficial cells

Pyriform-shaped intermediate

Polyhedral-shaped basal

45

A characteristic of urothelium is its _________ configuration in response to distention and contraction tensional forces caused by urine.

________ of aggregated proteins (uroplakins) are found in apical PMs of dome-shaped superficial cells

Transitional

Plaques