TEST 2

Question 1

Two components of tissue

Answer 1

• a discrete population of cells that are related in structure and function
• a surrounding material called extracellular matrix (ECM)

Question 2

What are the four types of tissues?

Answer 2

-Epithelial tissue
-connective tissue
-Muscle tissue
-Nervous tissue

Question 3

What are the functions of epithelial tissue?

Answer 3

-protection
-immune defense
-secretion
-transport into other tissues
-sensation

Question 4

Where is epithelial tissue located?

Answer 4

Every internal and external body surface

Question 5

What is the basic structure of epithelial tissue?

Answer 5

-Avascular (lacks blood)
-ECM found under basement membrane

Question 6

How is epithelial tissue classified?

Answer 6

-Number of layers = simple vs. stratified
-Shape= squamous, cuboidal, or columnar

Question 7

Function of simple squamous epithelia

Answer 7

-Rapid diffusion of oxygen and carbon dioxide
- Produces serous fluid

Question 8

Where is simple squamous found?

Answer 8

-Air sacs of lungs
-Lines body cavities

Question 9

What is the function of simple cuboidal epithelia

Answer 9

for absorption and secretion

Question 10

Where is simple cuboidal epithelia found?

Answer 10

-kidney tubules
-glands

Question 11

What is the function of simple columnar epithelia?

Answer 11

if it has microvilli- its for absorption
If it has cilia- its for secretion

Question 12

Where is simple columnar epithelia found?

Answer 12

-small intestine
-uterine tube

Question 13

What is the function of pseudostratified columnar epithelia?

Answer 13

if it is ciliated then it secretes and propels mucus

Question 14

Where is pseudostratified columnar epithelia located?

Answer 14

-Nasal cavity
-trachea

Question 15

What is the function of stratified squamous epithelia?

Answer 15

If it is keratinized- it protects from abrasion, and prevents water loss through skin
Nonkeratinized- Protects from abrasion

Question 16

Where is keratinized stratified squamous epithelia located?

Answer 16

Epidermis

Question 17

Where is nonkeratinized stratified squamous epithelia located?

Answer 17

Mouth and Vagina

Question 18

What is the function of the stratified cuboidal epithelia?

Answer 18

It is used for secretion

Question 19

Where is the stratified cuboidal epithelia located?

Answer 19

It is located in the sweat glands

Question 20

What is the function of the transitional epithelia?

Answer 20

it is used for stretching

Question 21

Where is the transitional epithelia located?

Answer 21

It is located in the urinary bladder

Question 22

What are glands?

Answer 22

-Structure that makes and secretes a product
-Formed by epithelial tissues that grew inward into the connective tissue

Question 23

What are exocrine glands?

Answer 23

They are glands that releases secretions to the apical surface through a duct
(think local actions)

Question 24

What are endocrine glands?

Answer 24

They are glands that releases secretions into the bloodstream (distant actions)

Question 25

What are unicellular glands?

Answer 25

They are typically exocrine, and composed of one cell

Question 26

What are goblet cells?

Answer 26

The most common unicellular gland that produce mucus

Question 27

What are multicellular glands ?

Answer 27

They are made from clusters of secretory cells

Question 28

What is the process of merocrine secretion?

Answer 28

The secretory epithelial cells have secretory vesicles and then product is released by exocytosis

Question 29

What is the process of holocrine secretion?

Answer 29

First epithelial cell undergoes mitosisi to replace a shed cell and then product accumulates in the secretory epithelial cell and lastly the cell is shed and ruputred by epithelial cells releasinng product