Page 332 - Color Atlas of Biochemistry

Kidney 323

A. Functions of the kidneys

1. Excretion 3. Hormone synthesis

Water
Salts
Metabolic
wastes Erythropoietin
Foreign V H Calcitriol
substances

4. Metabolism

Glucose Blood
2. Homeostasis

Acid-base balance Gluconeo-
Electrolyte balance Amino genesis
acids

NH 3 Urine

B. Urine formation
Distal
Resorption tubule
Afferent Glomerulus
arteriole Proximal
tubule Regulated
secretion

Ultra-
filtration

Final
urine Collecting
Secretion duct
Efferent Bowman’s
arteriole capsule
Renal corpuscle
Henle’s
loop
Ultrafiltration Secretion Resorption
Regulated
resorption
All solute H Glucose
plasma K
components Lactate
smaller Drugs 2-Oxoacids of H O
than Amino acids 2
3 nm = 15 kDa Uric acid
Creatinine Na , K , Ca 2 , Mg 2
2 2
Cl , SO 4 , HPO 4, HCO 3
Water, etc.

Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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