2.71 Ultrafiltration

Notes


Nephron filters blood =
-> Filtered blood ('clean blood')
-> Excreted urine
----> Urine emerges from bottom of nephron (water / salts (NaCl,MgCl) / Urea (Toxic nitrogen waste)

How is urine formed? ULTRAFILTRATION (filtration of molecules)

1. Blood arrives into nephron through afferent arteriole (high blood pressure)
----> Blood vessel branches into coils (glomerulus)
----> Efferent arteriole (smaller diameter) = increase blood pressure flowing out (higher pressure)
**Glomerulus increases blood pressure

2. High pressure forces liquid in blood (plasma) into the inside of Bowman's capsule
----> Plasma contains:
-----------> water / salts / amino acids / glucose / urea)

----> Plasma inside capsule known as 'glomerula filtrate' (contains)