Epithelial Tissues

Question 1

Made from specialized cells – made during development and group together to perform specific functions

Answer 1

tissues

Question 2

3 layers of tissues

Answer 2

1. Ectoderm – outer layer
2. Mesoderm – middle layer
3. Endoderm – inner layer

Question 3

process where cells form distinct properties

Answer 3

differentiation

Question 4

type of tissue that covers body surfaces, forms glands, and line body cavities, hollow organs, and ducts

Answer 4

epithelial tissue

Question 5

classification of epithelium according to cell layer

Answer 5

squamous
cuboidal
columnar
transitional

Question 6

classification of epithelium according to cell shape

Answer 6

Simple epithelium - 1 layer

Pseudostratified epithelium - 1 layer but appears many

Stratified epithelium - multiple layers

Question 7

type of simple epithelium tissue:
- Diffusion, filtration, some secretion, and some protection against friction
- lining of blood vessels and heart, lymphatic vessels, alveoli of the lungs, portions of the kidney tubules, lining of serous membrane

Answer 7

simple squamous epithelium

Question 8

type of epithelium tissue
- Secretion and absorption by cells of the kidney tubules
- secretion by cells of glands and choroid plexuses
- movement of particles embedded in mucus out of the terminal bronchioles
- kidney tubules, glands and their ducts, lining of terminal bronchioles of the lungs, choroid plexuses of the brain, surfaces of ovaries

Answer 8

Simple Cuboidal Epithelium

Question 9

type of epithelium tissue
- movement of particles out of the bronchioles of the lungs
- movement of ooctyes thru uterine tubes
- secretion of glands, stomach, & intestines
- absorption of small and large intestines
- glands and some ducts, bronchioles of the lungs, auditory tubes, uterus, uterine tubes, stomach, intestines, gallbladder, bile ducts, ventricles of the brain

Answer 9

simple columnar epithelium

Question 10

type of epithelium tissue
- accommodates fluctuations in the volume of fluid
- lining of urinary bladder, ureters, and superior urethra

Answer 10

transitional epithelium

Question 11

• synthesize and secrete mucus onto the free surface and move mucus
• lining of nasal cavity, nasal sinuses, auditory tubes, pharynx, trachea, and bronchi

Answer 11

Pseudostratified columnar epithelium

Question 12

• protection against abrasion, barrier for infection
• reduction of water loss from the body
• primarily skin (keratinized)
• mouth, throat, larynx, esophagus, anus, vagina, inferior urethra, cornea (nonkeratinized)

Answer 12

Stratified squamous epithelium

Question 13

tightly joined into functional units by points of contact between their plasma membranes

Answer 13

cell connections

Question 14

cell connection: prevents the contents of organs from leaking out

Answer 14

tight junctions

Question 15

cell connection: form stable adhesive junctions between cells

Answer 15

desmosomes

Question 16

cell connection: attach cells to membranes

Answer 16

hemidesmosomes

Question 17

cell connection: channels that allow ions and molecules to pass between cells

Answer 17

gap junction