Week 2 Histology

Question 1

What is the renal corpuscle?

Answer 1

Glomerulus + bowmans capsule- Knot of blood vessels- where filtration occurs

Question 2

What are vasa recta?

Answer 2

Straight vessels running down through the medulla.

Question 3

What epithelia lines the parietal layer of bowmans capsule and what is its function?

Answer 3

Simple squamous

Makes funnel to collect ultra filtrate

Question 4

What is the urinary pole?

Answer 4

At bottom of bowmans capsule - funnel that collects ultra-filtrate

Question 5

What cell type is found in the visceral layer and how does filtrate pass through this layer?

Answer 5

endothelium fenestrated and podocytes have foot like processes- between projections are filtration slits
- endothelium and podocytes share basement membrane- very leaky

Question 6

What generally occurs in the PCT and what endothelia are present to help this function?

Answer 6

Simple cuboidal with brush border allow reabsorption to occur

Question 7

What are the 4 parts of the loop of henle and what epithelia are present in each section?

Answer 7

Pars recta- straight part
Thin descending limb
Thin ascending limb
- thin limbs- dipping down into medulla- simple squamous- no active transport
Thick ascending limb
- simple cuboidal no brush border- active transport occurs

Question 8

What epithelia are present in the DCT?

Answer 8

Simple cuboidal- no brush border, large lumen, many mitochondria

Question 9

What cell type are present in the DCT?

Answer 9

Macula Densa cells- sensitive to NaCl conc.

Question 10

In the ureter how many muscle layers are there and what epithelia line them?

Answer 10

2 smooth muscle layers, 3 layers in lower 1/3

Transitional epithelium

Question 11

How many muscle layers are in the bladder and what epithelia are present?

Answer 11

3 layers of muscle and outer adventitia

Transitional epithelia