SBI4U Urine Formation in the Nephron.pdf - Reminders the Nephron SBI4U Urine Formation in the Nephron What part of the kidney is the top half of the

SBI4U Urine Formation in the Nephron.pdf - Reminders the...

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8/25/16 1 SBI4U Urine Formation in the Nephron Reminders à the Nephron What part of the kidney is the top half of the nephron in? What part of the kidney is the lower half of the nephron in? What is the nephron surrounded by? Four Processes in Urine Formation 1. Glomerular filtration: H 2 O & solutes move from blood into nephron 2. Tubular reabsorption: Useful substances move from filtrate into blood 3. Tubular secretion: Wastes & excess substances move from blood into filtrate 4. Water reabsorption: H 2 O moves from filtrate into blood Remember… filtrate? Step 1: Glomerular Filtration Afferent arteriole branches from renal artery to supply blood to glomerulus Small pores in capillaries only allow water, salts, nutrients, and wastes to pass through into the nephron = filtrate (pre- urine) Blood pressure is 4x higher to facilitate filtration
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8/25/16 2 7 Step 1: Glomerular Filtration Solute Blood Glomerular Filtrate Water yes NaCl yes Glucose yes Amino Acids yes H + ions yes Plasma Proteins
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  • Winter '16
  • Nephron, filtrate

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