Lecture43: Microstructure Of Renal Tubules

Question 1

What is the target of the proximal tubule?

Answer 1

Reabsorption of 70% of water and electrolytes

Question 2

What is the most cortical renal tissue?

Answer 2

The Proximal tubule

Question 3

Describe the proximal tubular cells shape

Answer 3

Simple cuboidal epithelium, with a brush border due to absorption

Question 4

Which loop of henle type are high cortical?

Answer 4

Short looped

Question 5

Which loop of henle type are juxtamedullary?

Answer 5

Long looped

Question 6

Where is hypertonic urine formed?

Answer 6

In the Loops of Henle

Question 7

Which part of the loop of henle reabsorbs water?

Answer 7

Descending thin part

Question 8

The ascending limb of loop of henle has a thin and thick part, what do each do?

Answer 8

The thin reabsorbs sodium, thick is impermeable to water, but also reabsorbs sodium

Question 9

The DCRT reabsorbs water and electrolytes under the influence of?

Answer 9

Aldosterone

Question 10

Name another DCRT function

Answer 10

Urine acidification

Question 11

Under L.M the DCRT shows…?

Answer 11

Nucleus near apex, poorly developed apical microvilli

Question 12

The DCRT has extensive basal infoldings and abundant mitochondria, why?

Answer 12

For active sodium transport

Question 13

The Collecting ducts L.M findings are?

Answer 13

Pale acidophilic cytoplasm with simple cuboidal

Question 14

There are two types of cells lining the collecting ducts, what are they?

Answer 14

Principal and Intercalated cells

Question 15

Differences between principal and intercalated cells?

Answer 15

The intercalated regulate the acid base balance, are dark and fewer, mainly in smaller ducts