Epithelial Histology

Question 1

Simple Squamous Epithelium

Answer 1

One layer of flat cells

Found in endothelium (lining of blood vessels)
Mesothelium

Question 2

mesothelium

Answer 2

lining of peritoneum or pleura

Question 3

endothelium

Answer 3

lining of the blood vessels

Question 4

Simple cuboidal epithelium

Answer 4

one layer of cuboidal shaped cells

Found in distal tubules of kidney, excretory ducts of glands, thyroid follicles, and ovarian surface

Question 5

Simple columnar epithelium

Answer 5

one layer of very tall cells, they often have microvilli, some found in intestine have the microvilli that make up the brush border enzymes

Found in linings of stomach, intestine, excretory ducts

Question 6

Pseudostratified epithelium

Answer 6

all cells connected to one basal layer, some are columnar and super tall, others are shorter, the shorter often split off into tall ones, columnar cells in this often have cilia attached

Found in linings of trachea, bronchi, nasal cavity, and excretory ducts in parotid gland

Question 7

Stratified squamous epithelium

Answer 7

many layers of cells, notice cells near the lumen are flattened so hence the squamous nomenclature,
can be non keratinized or keratinized

found in mouth, esophagus, vagina, anus

Question 8

stratified cuboidal epithelium

Answer 8

many layers of cuboidal cells,

found in excretory ducts and sweat glands but really not common

Question 9

stratified columnar epithelium

Answer 9

many layers of columnar, not found often but in excretory ducts and cavernous urethra

Question 10

transitional epithelium AKA urothelium

Answer 10

many layers, can be domed or flattened depending on if ureters/bladders are filled with urine

The lumen cells are often called umbrella cells when they are allowed to be domed and the bladder is empty

Question 11

Exocrine glands, example of Uni and Multicellular

Answer 11

These secrete out of the blood, so into a lumen or onto a surface

Uni are goblet cells
Multi are salivary glands

Question 12

pemphigus bulgaris

Answer 12

problem with desmosomes, skin will have blisters that burst and also oral issues

Question 13

bollous pemphigolus

Answer 13

problem with hemidesmosomes, issues on skin but not orally

Question 14

Dark glands in oral cavity on staining

Answer 14

serous glands, secretes proteins that stain dark

simple cuboidal

Question 15

light glands in oral cavity staining

Answer 15

mucous glands, not secreting protein and are highly glycosylated so dont pick up stain

Question 16

Apocrine secretion

Answer 16

gland releases parts of cells cytoplasm

Question 17

holocrine secretion

Answer 17

release of entire secretory cell

Question 18

merocrine secretion

Answer 18

release of gland contents by exocytosis