Epithelial

Question 1

Simple squamous epithelium

Answer 1

Description: single layer of flattened cell with disc-shaped central nuclei

Function: allow passage of materials by diffusion and filtration in site where protection is not important; secretes lubricating substances

Location:kidney glomeruli and corpuscles,air sacs of lungs,lining of heart

Question 2

Simple cuboidal epithelium

Answer 2

Function: secretion and absorption

Location: kidney tubules; ducts and excretory portions of small glands;ovary surface

Question 3

Simple columnar epithelium

Answer 3

Function: absorption, secretion of mucus,Enzymes and other substance, ciliated type

Location: Nonciliated type line most of the digestive tract,gallbladder and excretory ducts of some glands

Question 4

Pseudostratified columnar epithelium

Answer 4

Function: secretion,particularly of mucus

Location: Nonciliated type in male’s sperm-carryi6ducts and ducts of large glands; collated variety lines the trachea, most of the upper respiratory tract

Question 5

Stratified squamous epithelium

Answer 5

Function: protect underlying tissues in areas subjected to abrasion

Location: Nonkeratinized type firms the moist linings of the esophagus,mouth and vagina, keratinized variety forms the epidermis of the skin

Question 6

Stratified cuboidal epithelium

Answer 6

Function: protection

Location: largest ducts of sweat glands, mammary glands and salivary glands

Question 7

Stratified columnar epithelium

Answer 7

Function: protection, secretion

Location: Rare in body; small amounts in male urethra and in large ducts of some glands

Question 8

Transitional epithelium

Answer 8

Function: stretches readily and permits dissension of urinary organ by contained urine

Location: lines the ureters,bladder and part of the urethra