Parts/Function Of Urinary System

Question 1

Glomerulus/Bowman’s Capsule

Answer 1

Forms ultrafiltrate of plasma
-uses startling forces

Question 2

Proximal tubule

Answer 2

Bulk reabsorption of solutes and water
-secretion of solutes and organic acids and bases

-uses active transport of solutes with passive water reabsorption
-parathyroid hormone inhibited K+ reabsorption

Question 3

Loop of henle

Answer 3

Establishes medullary osmotic gradient
-secretion of urea

Question 4

Descending limb

Answer 4

Bulk reabsorption of water
-passive water reabsorption

Question 5

Ascending limb

Answer 5

Reabsorption of NaCl
-active transport

Question 6

Distal tubule and cortical collecting ducts

Answer 6

Fine tuning of reabsorption and secretion of small quantity of solute remaining

-aldosterone (Na reabsorption and K excretion)

Question 7

Cortical and medullary collecting ducts

Answer 7

Fine tuning of water reabsorption
-reabsorption of urea

-vasopressin inc passive reabsorption of water