Tissue and shape of epithelial cells

Question 1

location of simple squamous epithelium

Answer 1

lining of heart, blood & lymphatic vessels (endothelium)
lining body cavities(mesothelium)
bowman’s capsule of kidney
lining respiratory spaces of lung

Question 2

Function of simple cuboidal cells (3)

Answer 2

Absorption
Secretion
Barrier

Question 3

Location of simple cuboidal cells

Answer 3

small ducts of exocrine glands
surface of ovary
kidney tubules
thyroid follicles
liver hepatocytes

Question 4

Function of simple columnar epithelium

Answer 4

secretion, absorption

Question 5

Location of simple columnar epithelium

Answer 5

stomach
small intestine
large intestine
Gall bladder
Uterine tube

Question 6

Major function of pseudostratified epithelium

Answer 6

secretion
conduit
absorption

Question 7

location of pseudostratified epithelium

Answer 7

trachea & bronchial tree

male reproductive tract (ductus deferens, epididymis)

Question 8

Function of stratified squamous epithelium

Answer 8

protection against injury & abrasion and barrier to dehydration & infection

Question 9

location of stratified squamous epithelium

Answer 9

esophagus
vagina
epidermis
oral cavity

Question 10

stratum corneum

Answer 10

dead cells filled with keratin filaments

Question 11

stratum granulosum

Answer 11

most superficial layer of nucleated squamous cells

Question 12

Stratum basale

Answer 12

layer of cuboidal cells attached to the basement membrane

Question 13

Location of stratified cuboidal epithelium

Answer 13

duct of eccrine sweat gland
large ducts of exocrine glands
Anorectal junction

Question 14

Location of stratified columnar epithelium

Answer 14

largest ducts of exocrine gland

anorectal junction

Question 15

Location of transitional epithelium

Answer 15

Urinary system

Question 16

In empty bladder how are the shapes of cells of transitional epithelium?

Answer 16

basal cells are mostly cuboidal, middle layer polygonal and apical cells bulge into the lumen

Question 17

In stretched bladder how are the shapes of cells of transitional epithelium?

Answer 17

thickness of epithelium is reduced and superficial cells are flattened.

Question 18

Another name of stratified epithelium lining urinary tract

Answer 18

urothelium

Question 19

Location of cilia

Answer 19

respiratory epithelium,

fallopian tube

Question 20

What is another name of microvilli?

Answer 20

brush border

Question 21

What is microvilli made up of?

Answer 21

actin microfilaments

Question 22

Where is microvilli anchored on?

Answer 22

terminal web which contain microfilaments to stabilize microvilli

Question 23

Location of microvilli

Answer 23

Small intestine
gall bladder
kidney

Question 24

Location of stereocilia

Answer 24

epididymis
vas deferens
inner ear

Question 25

Steps of DNA methylation for repression of transcription (4)

Answer 25

1. Dnmt3 methylates unmethylated DNA
2. MeCP2 recruits HDAC1
3. HDAC1 deacetylates histones
4. Heterochromatin is formed

Question 26

Role of histone acetylation

Answer 26

reduces affinity between histone and DNA, which increase transcription.

Question 27

Purine

Answer 27

Adenine and guanine

Question 28

Pyrimidine

Answer 28

Thymine and Uracil , Cytosine