Urinary Overview

Question 1

What is the normal corticomedullary ratio in animals?

Answer 1

1:2 or 1:3

Question 2

Which species have several lobes with a medulla that ends in a renal crest?

Answer 2

Horses, dogs, sheep

Question 3

Which species has a single lobe with a medulla that ends in a renal papilla?

Answer 3

Cats

Question 4

What species are multilobulated?

Answer 4

Cattle, pigs, and primates

Question 5

What species have multiple papillae?

Answer 5

Cattle and pigs

Question 7

Each lobule ends in a single __________

Answer 7

Collecting duct

Question 8

Where are the veins in the capsule of the dog vs. the cat?

Answer 8

Cat- within the capsule
Dog- subcapsular

Question 9

Pathway to renal arteriole constriction

Answer 9

Low NaCl in DCT–>macular densa makes PGE2–>Renin release by juxtaglomerular cells of afferent arteriole–>angiotensinogen from liver converted to angiotensin I–> converted to angiotensin II by ACE (from MD)–>stimulates aldosterone secretion and ADH release

Question 10

Role of extraglomerular mesangial cells

Answer 10

EPO secretion and renin production