Intro to Renal Phys

Question 1

Role of the Renal System

Answer 1

• excretion
• water/electrolyte balance
• pH regulation
• control of the circulating volume
• hormone secretion
• gluconeogenesis

Question 2

Excretion

Answer 2

• rid the body of water soluble wastes (urea, creatine, uric acid, etc)
• eliminate toxins and foreign substances (drugs, pesticides)

Question 3

Electrolyte Balance

Answer 3

• water intake = water output
• sodium intake = sodium output
• sodium/potassium balance

Question 4

pH Regulation

Answer 4

• reabsorption/excretion (H+ ions and HCO3 ions)

- elimination (sulfuric and phosphoric acid)

Question 5

Control of Circulating Volume

Answer 5

• Control of circulating volume

- Control of BP (renin-angiotensin-aldosterone system)

Question 6

Hormone Secretion

Answer 6

• The Big 4
  1) Angiotensin II
  2) Aldosterone
  3) ADH
  4) Atrial Natriuretic Peptide
• Erethropoietin –> RBCs
• Calcitrol

Question 7

Gluconeogenesis

Answer 7

• create glucose from AAs

- active during periods of prolonged fasting