Histology: Urinary Tract II

Question 1

What are the 2 types of barriers that the glomerulus provides?

Answer 1

• Size - Charge (negatively charged proteins are repelled)

Question 2

What are the narrow tubules with more eosinophilic cells?

Answer 2

Proximal Tubule

Question 3

What is a prominent feature of the PT?

Answer 3

Abundant brush border that increases the SA and thus the absorptive function

Question 4

What is the function of the juxtaglomerular apparatus?

Answer 4

Formed by the DT and the afferent arteriole with the function of regulation of BP and GFR via Na/Cl concentration

The juxtaglomerular apparatus is a specialized structure formed by the distal convoluted tubule and the glomerular afferent arteriole. The main function is to regulate blood pressure and the filtration rate of the glomerulus.

The juxtaglomerular cells, modified smooth muscle cells in the wall of the afferent artriole, secrete renin in order to reglate blood pressure.

Question 5

What is the function of the mesangial cells?

Answer 5

• Provide support
• Phagocytosis
• Regulate blood flow of the glomerular capillaries

Question 6

What parts of the nephron does the medulla contain?

Answer 6

• Loop of Henle
• Collecting Duct

Question 7

What is shown?

Answer 7

Medulla

Question 8

What is shown?

Answer 8

Cortex