Extra Renal Sys. Q's

Question 1

Cortical nephrons?

Answer 1

80% of all nephrons

located in cortex

Question 2

Juxtamedullary nephrons?

Answer 2

Closer to renal medulla
can produce more concentrated urine
longer loops of Henle

Question 3

Give 3 examples of metabolic waste products that kidneys need to excrete

Answer 3

Urea
Creatinine
Bilirubin

Question 4

Name the 3 hormones produced in the kidney

Answer 4

EPO
Vitamin D3 (active form)
Renin

Question 5

Vitamin D3 is important for?

Answer 5

controlling Ca ++ in blood

Question 6

List the 4 principles of urine excretion & formation

Answer 6

1. filtration
2. reabsorption
3. secretion
4. excretion

Question 7

What is GFR and what does it depend on?

Answer 7

Glomerular Filtration Rate =amount of filtrate kidneys produce per minute.
depends on net glomerular filtration pressure

Question 8

Describe the renal threshold

Answer 8

plasma concentration at which saturation of transport process occurs (transport maximum)

Question 9

ADH stimulates?

Answer 9

absorption of water by principal cells of DCT & CD

Question 10

Aldosterone increases?

Answer 10

Sodium (Na) reabsorption and K+ secretion

Question 11

Actions of angiotensin II?

Answer 11

stimulates aldosterone release
Increases MAP (BP) by systemic vasoconstriction