Chapter 9

Question 1

What are the two types of epithelial tissue?

Answer 1

Membranous and glandular

Question 2

Where is epithelial tissue found?

Answer 2

Covers the body , Lines the serous cavities, blood, lymphatic vessels, respitory,digestive and genitourinary tracts

Question 3

What are glandular epithelium

Answer 3

Secretory units of endocrine and exocrine glands.

Question 4

5 Functions of epithelial tissue

Answer 4

Protection (most important)
Sensory
Secretion
Absorption 
Excretion

Question 5

Describe the placement/packing of cells in epithelial tissue

Answer 5

Tightly packed sheet with many demosomes and tight junctions

Question 6

Epithelial cells attached to _________ membrane

Answer 6

Basement membrane

Question 7

Epithelial cells have __________ matrix material

Answer 7

Limited amount ]

Question 8

Describe the vascular it’s of epithelial cells

Answer 8

Avascular

Question 9

Describe the reproduction of epithelial tissue

Answer 9

Capable of reproduction as many go through wear and tear

Question 10

4 classifications of epithelial tissue by shape and describe

Answer 10

1. Squamous (flat and scale like)
2. Cuboidal (cube shaped)
3. Columnar (taller than they are wide)
4. Pseudostratified columnar (‘fake’ columnar)

Question 11

Classification by layer arrangement layers of cells

Answer 11

1. Simple (single layer, same shape)
2. Stratified (multiple layers, named according to shape of cells in outer layer)
3. Transitional (varying shapes that can stretch)

Question 12

Types of combined shape and arrangements of epithelial tissue

Answer 12

Simple squamous 
Stratified squamous 
Simple columnar 
Stratified squamous
Stratified cubodial
Stratified columnar 
Stratified transitional
Pseudostratisfied columnar

Question 13

Describe 4 features of simple squamous epithelium

Answer 13

Single layer of flat scale shaped cells

Structure perfect for transport/ diffusion (absorption into blood)

Permeable to many substances

Located in alveoli of lungs, lining of blood and lymphatic vessels

Question 14

Describe 4 characteristics of simple cubodial epithelium

Answer 14

Single layer of cube shaped cells

Often specialized for secretly activity

Grouped into tubules (urine producing in the kidney)

Grouped into glands (can be endocrine or exocrine)

Question 15

Describe 4 features of simple columnar epithelium

Answer 15

Single layer of tall narrow, column- shaped cells

Composed surface of mucous membranes that line stomach, intestines, parts of respitory and reproductive

Contain mucous producing goblet cells

Specialized for absorption (microvilli)

Question 16

Describe 4 features of pseudostratified columnar epithelium

Answer 16

• columnar cells of varying heights
• single layer of cells that wedge together to appear as if there are two or more layers
• each cell touches basement membrane
• lining of respiratory tract and parts of reproductive

Question 17

Describe 3 features of stratified squamous epithelium

Answer 17

• several layers of closely packed cells
• protection is primary function (eg. preventing microbes from getting through skin)
• can be keratinization or non-keratinized depending on location in body

Question 18

Describe three features of stratified cubodial epithelium

Answer 18

Two or more rows of cubodial cells randomly arranged over a basement membrane

Protective function

Located in sweat glands, pharynx and epiglottis

Question 19

Describe 4 features of stratified columnar epithelium

Answer 19

Multiple layers of columnar cells

Only most superficial cells are typical in shape

Protective

Rare (located in segments of male urethra (for boners, and near anus)

Question 20

Describe 3 features of stratified transitional epithelium

Answer 20

Up to 10 layers of roughly cubodial shaped cells that distort to squamous shape when stretched

Protective function

Found in body areas subject to stress and that stretch (eg urinary bladder)

Question 21

3 features of glandular epithelium

Answer 21

Specialized for secretory activity and can function on their own or in clusters

Exocrine glands - discharge into ducts

Endocrine glands - ductless glands- discharge into blood