Fiddly histology

Question 1

Layers of gi tract generally speaking

Answer 1

Mucosa
Submucosa
Muscularis externa
Serosa

Question 2

Parotid colour histologically

Secretes what

Answer 2

Dark pink

Serous

Question 3

Sublingual colour

Secretes

Answer 3

Paler fluffy

Mucous

Question 4

Submandibular secretes

Answer 4

Mix of mucous and serous

Question 5

What does elastic cartilage look like

Answer 5

Pale greyish (basinophilic extracwllular matrix )irregular circles. Couple nuclei about- chondrocytes

Question 6

Reinkes space

Answer 6

Between vocal cord and epithelium

Question 7

Space of disse

Answer 7

Between heoatocytw and sinusoid

Question 8

Reinkes crystalloids

Answer 8

Leydig cells

Question 9

Collagen type 3

Answer 9

Reticulin
Scaffold for liver spleen bone marrow
Branched

Question 10

Ito cells

Answer 10

Store fat in liver , in space of disse

APC

Question 11

Collagen type 1

Answer 11

Teeth tendons bone skin

Question 12

Collagen type 2

Answer 12

Cartilage

Question 13

Collagen type 5

Answer 13

Placenta

Question 14

Collagen type 4

Answer 14

Basement membrane

Question 15

Interstitial cells of cajal

• where
• function
• tumour of them-

Answer 15

• muscularis externa/propria of intensities
• pace maker cells
• GIST

Question 16

Bartholins glands
- where
-what
-

Answer 16

Vagina
Lubrication
Equivalent to male’s bulbourethral glands

Question 17

appendix and colon histology- how different to small intestine

Answer 17

flat- no villi – like colon

appendix got lymphoid

colon has mucus glands - crypts of lieberkuhn (brunners? )

Question 18

carb absorption

Answer 18

secondary active transport

sodium glucose cotransporter

Question 19

protein absorption

Answer 19

sodium glucose cotransporter (apical membrane)
facilitated diffusion (basal membrane)

Question 20

lipid absorption

Answer 20

bile forms micelles
pancreatic lipase breaks micelles down into fatty acids
diffuse as fatty acids
packaged as chylomicrons
in lacteals (lymphatics that will eventually enter blooood)

Question 21

elastic von gieson stains what (and what colour for each)

Answer 21

elastic fibres- brown
collagen- red/pink
muscle - yellow

Question 22

alcian blue stains WHAT

Answer 22

mucins (mucous, cartilage, mast cells)

Question 23

cervical transformation zone- which has what epithelium tytpe

Answer 23

ectocervix= stratified squamous
endocervix = simple columnar (glandular)

Question 24

weibel palade bodies vs arantius.

Answer 24

weibel palade in endothelial cells (storage)

arantius in aortic and pulmonary valve cusps (fibroelastic clumps)

Question 25

Paneth cells

• where
• what

Answer 25

duodenum in crypts = crypts of lieberkuhn!!!!
secrete lysosome- breaks down bacteria (their cell walls!)

(duodenum also has brunners glands for bicarb)