14.3 Filtration, Reabsorption, & Secretion

Question 1

Filtrate should not contain any

Answer 1

Cellular material or protein

Question 2

Filtration slits formed by

Answer 2

Woven intercalated podocytes

Question 3

Filtrate is officially urine when it reaches the

Answer 3

Papillary duct

Question 4

Steps of the nephron

Answer 4

PCT (obligatory reabsorption - glucose, amino acids) most things reabsorbed here

Loop of Henle (creates salt gradient in the medulla)

DCT (variable reabsorption, & secretion - pH adjustments)

Collecting duct (water absorbs)

Papillary duct (it’s now urine)

Question 5

Collecting ducts

Answer 5

Pass through medulla (high concentration sodium and urea)

The H2O is drawn out through aquaporin channels. Regulated by ADH

Question 6

Aldosterone increases

Answer 6

Sodium reabsorption, increases water, increases blood volume and pressure