Lecture 2 - Epithelium

Question 1

What are cancers of epithelial tissues called?

Answer 1

carcinomas

Question 2

What two layers make up the basement membrane?

Answer 2

Basal lamina & reticular lamina

Question 3

What type of collagen makes up the basal lamina layer?

Answer 3

Type IV

Question 4

What type of collagen makes up the reticular lamina layer?

Answer 4

Type III

Question 5

What type of collagen anchors the basal lamina to the reticular lamina?

Answer 5

Type VII

Question 6

Lining of vascular system (blood/lymph)

Answer 6

Endothelium

Question 7

Lining of body cavities (peritoneum, pleura, pericardium)

Answer 7

Mesothelium

Question 8

Where in the body is simple squamous epithelium found?

Answer 8

Endothelium, mesothelium, respiratory spaces (lining), Bowman’s capsule (EMRBC)

Question 9

Where in the body is stratified squamous epithelium found?

Answer 9

Epidermis, vagina, esophagus, oral cavity (EVEO)

Question 10

Where in the body is simple cuboidal epithelium found?

Answer 10

Small ducts of exocrine glands, Kidney tubules, Ovary “germinal” epithelium (on outside of ovary) (SDEG K O)

Question 11

Where in the body is simple columnar epithelium found?

Answer 11

Small intestine, colon, gallbladder, stomach lining, gastric glands (SIC GSGG)

Question 12

Where in the body is pseudostratified columnar epithelium found?

Answer 12

Trachea, bronchi, ductus deferences, efferent ductules of epididymus (TB DD EDE)

Question 13

Where in the body is stratified cuboidal epithelium found?

Answer 13

Sweat gland ducts, anorectal junction, large ducts of exocrine glands (SGD AJ LDEG)

Question 14

Where in the body is stratified columnar epithelium found?

Answer 14

Anorectal junction, LARGEST exocrine gland ducts (salivary) (AJ LDEG)

Question 15

Where in the body is transitional epithelium found?

Answer 15

Renal calyces, bladder, ureter, urethra (RC B U U)

Question 16

What is the characteristic pattern/appearance of transitional epithelium (more apparent when not stretched)?

Answer 16

Scalloped

Question 17

What tissue do glands originate from?

Answer 17

Epithelium

Question 18

Glands that secrete products onto surface via ducts

Answer 18

Exocrine

Question 19

Glands w/o ducts that secrete into connective tissue spaces where secretions are absorbed into blood stream by capillaries.

Answer 19

Endocrine (hormones)

Question 20

List an example of a unicellular gland?

Answer 20

Goblet cell in tracheal epithelium

Question 21

How is mucous stained by H&E?

Answer 21

Doesn’t stain-translucent

Question 22

How is mucus stained by PAS?

Answer 22

Stains dark magenta (PAS stains carbohydrates in mucus)

Question 23

Watery secretions often rich in enzymes

Answer 23

Serous secretions

Question 24

Contain both mucus and serous substances. What type of gland produces this?

Answer 24

Mixed secretions. Only multicellular glands can produce mixed secretions.

Question 25

List the mechanisms of secretions (3).

Answer 25

1) Merocrine
2) Apocrine
3) Holocrine

Question 26

Secretion type where cells release their contents by exocytosis + one example of gland that produces this type of secretion

Answer 26

Merocrine, ex parotid salivary gland

Question 27

Secretion type where part of the secretory cell apical cytoplasm is released along with the contents + one example of gland that produces this type of secretion

Answer 27

Apocrine, ex lactating mammary gland

Question 28

Secretion type where entire secretory cell & contents are released + one example of gland that produces this type of secretion

Answer 28

Holocrine, ex sebaceous gland

Question 29

What are the common shapes of secretory units (3)?

Answer 29

1) Acinar - “sac”
2) Alveolar - flask-like
3) Tubular - straight, coiled, branched