Epithelial Tissues

Question 1

Basement Membrane

Answer 1

Closest to the epithelium
This is also called basal lamina but further away is called the reticulum lamina

Question 2

Simple Squamous Epithelium

Answer 2

Single layer of flat cells
Location: lines blood vessels, air sacs of the lungs, and portions of the kidney, lymphatic vessels, serosa and lining of heart
Function: diffusion and filtration

Question 3

Simple cuboidal epithelium

Answer 3

Single layer of cubed shaped cells
Location: in kidney tubules, ducts and secretory portions of small glands, pancreas and ovary surface
Function: secretes various substances and is used for protection, limited protection

Question 4

Simple columnar epithelium

Answer 4

Single layer of tall cylindrical cells with oval like nuclei at the base of the cells
Location: in the gastrointestinal tract from stomach to anus, stomach, small and large intestines and gallbladder, some regions of the uterus
Function: absorption and secretion

Question 5

Pseudostratisfied columnar epithelium

Answer 5

All the cells in this tissue contact the basement membrane and has cilia at its surfaces
Location: nasal cavity, windpipes, and bronchi also present in male sperm carrying ducts, fallopian tubes and respiratory tracts
Function: secretion and propulsion of mucous

Question 6

Stratified squamous epithelium

Answer 6

Occurs where stress is severe
Location: mouth, esophagus, the terminal surface of the tongue and the vagina
Function: protection of underlying areas subjected to chemical and mechanical stresses

Question 7

Stratified columnar epithelium

Answer 7

Tall cells in layers
Location: in portions of the pharynx, lining of some glandular ducts, male urethra, and anus
Function: protection and secretion

Question 8

Stratified cuboidal epithelium

Answer 8

Layer of cubed shaped cells, typically two cell layers thick
Location: found along the ducts of sweat glands in the skin and in certain ducts of the mammary glands
Function: protection, secretion, and absorption

Question 9

Transitional epithelium

Answer 9

Contains a variety of cells from squamous to cuboidal to columnar cells
Location: in the urinary bladder, ureters and part of the urethra
Function: stretches to permit distension of the urinary bladder when filled with urine. After urine is discharged it assumes a compacted appearance

Question 10

Cellularity

Answer 10

Composed almost entirely of cells

Question 11

Special contacts

Answer 11

Form continuous sheets held together by tight junctions and desmosomes

Question 12

Polarity

Answer 12

apical and basal surfaces

Question 13

Supported by connective tissue

Answer 13

Reticular and basal laminae

Question 14

A vascular but innervated

Answer 14

Contains no blood vessels but supplied by nerve fibers

Question 15

Regenerative

Answer 15

Rapidly replaces lost cells by cell division

Question 16

Glandular

Answer 16

One or more cells that makes and secretes an aqueous fluid

Question 17

Serous gland

Answer 17

Secretion is watery and contains enzymes

Question 18

Mucous gland

Answer 18

Secretion is a thick mucous

Question 19

Mixed exocrine glands

Answer 19

May produce serous and mucous secretion

Question 20

Tubular

Answer 20

glandular cells form tubes

Question 21

Alveolar

Answer 21

Glandular cells form pockets (circular)

Question 22

Tubuloalveolar

Answer 22

Tubes and pockets

Question 23

Simple

Answer 23

Duct does not divide on its way to secretory unit

Question 24

Compound

Answer 24

Does divide on its way to the secretory unit