Epithelium And Glands

Question 1

Simple cuboidal epithelium

Answer 1

Function: secretion and absorption

Location: Kidney tubules; ducts and secretory portions of small glands, ovary surface

Question 2

Simple columnar epithelium

Answer 2

Function: Absorption, secretion of mucus, and other substances (or reproduct cells) by ciliated action.
Goblet cells [uni]

Location: digestive tract (stomach to anal canal), gallbladder and excretory ducts of some glands

Question 3

7 functional groups of cells

Answer 3

Secretory, protective, absorptive, transport, contract, connect, internal communication

Question 4

4 basic tissue type

Answer 4

Epithelial, connective, muscular, nervous

Question 5

Modes of secretion

Answer 5

Merocrine apocrine holocrine

Question 6

Tight junctions

Answer 6

Aka occluding junctions/ zonula occludens

preventing ion passage, each strand is formed from a row of transmembrane proteins (claudins and occludins)

Question 7

Adherens junctions

Answer 7

Aka zonula adherens

• cytoplasm linked to actin cytoskeleton
• Junctions are composed of cadherins (proteins that form homodimers in a calcium-dependent manner)

Question 8

Gap junctions

Answer 8

specialized intercellular connection between cells

-gap junction channel is composed of connexon

Question 9

Desmosomes

Answer 9

Aka macula adherens

• cell structure specialized for cell-to-cell adhesion.
• The cell adhesion proteins are (desmoglein and desmocollin), members of the cadherin family

Question 10

Secretory cells

[feature & location]

Answer 10

Numerous secretory granules

[endocrine & exocrine]

Question 11

Protective cells

[feature & function]

Answer 11

Flat cells, wide and thin (shingles)

Protect

Question 12

Absorption cells

[feature & function]

Answer 12

• Fuzzy border
• Increase SAxV ratio (microvili)/ absorb material ex gut, reprod
• Square columnar

Question 13

Transport cells

[feature & function]

Answer 13

Flagella or cilia

Move cell or fluid ex respiratory

Question 14

Connect/support cells

[feature & function]

Answer 14

Prominent nucleus/ active
Fusiform/ovoid
Produce extracellular matrix

Question 15

Contractility cells

[feature & example]

Answer 15

Columnar to fusiform (not flat)

Myofibrils ex actin myosin

Question 16

Internal communication

Answer 16

Nerves

Question 17

Basement membrane

Answer 17

Lies beneath cell and b/w C.T

Basal lamina & lamina reticularis

Question 18

Basal lamina

Answer 18

Closer to epithelium

Lamina lucida & lamina densa

Question 19

Lamina densa

Answer 19

Collage IV fibers

Fibers connect epithelium to next layer

Question 20

Lamina reticularis

Answer 20

Formed by C.T
Connecting to lamina densa
Collagen I fiber

Question 21

Epithelial tissue

Function & looks

Answer 21

• Flat cells, many layers

- Protection, lining organs, skin, tracts

Question 22

Connective tissue

Function

Answer 22

• Non-descrip

- Prod. a lot of extracellular matrix, connect things ex. Bone cartilage

Question 23

Muscular tissue

Function/shape

Answer 23

Columnar to spindle shape

Move and contract ex skin

Question 24

Nervous tissue

Answer 24

Long excitable

Question 25

Merocrine

Answer 25

Exocytosis, granule fuse w/ membrane | Parotid gland

Question 26

Apocrine

Answer 26

Small apical bleb | Buds off taking membrane with it

Question 27

Holocrine

Answer 27

Cell disintegrates Throw everything at one time Sebaceous gland

Question 28

Simple squamous epithelium | Endothelium

Answer 28

Function: Allows passage of materials by diffusion and filtration in sites where protection is not important blood vessels, and lymphatic vessels; lining of ventral body cavity(serosae)