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CONTROL SYSTEMS
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(Topic 1) Biology: B3 Mapa Mental sobre CONTROL SYSTEMS, creado por Nico16 el 22/04/2013.
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biology: b3
topic 1
biology: b3
topic 1
Mapa Mental por
Nico16
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CONTROL SYSTEMS
The Urinary System
Cells produce waste products which diffuces into the blood. +carbon dioxide from respiration +urea from breakdown of amino acid in liver
The urinary system produces, stores and removes urine from the body. Kidneys remove ecess water and urea.
Kidney Failure
Medical condition when the kidneys can no longer filter waste products
SYMPTOMS: Vomiting, Diarrhoea, Nausea and urine problems (more concentrated + infrequent OR less concentrated + frequent)
CAUSED BY: Restriction of blood flow to kidneys OR massive does of toxins. Aloso by diabetes.
TREATMENTS: Kidney transplant OR Kidney dialysis (filtering of blood by machine)
The Kidney
Three stages in the working of the kidney
1) FILTRATION: Water + small molecules squeezed out of blood under pressure.
2) SELECTIVE REABSORPTION: Useful substances reabsorbed into blood + water level in blood adjusted to remain constant (OSMOREGULATION)
3) EXCRETION OF WASTE: Excess water, ions and all urea passes to bladder in form of urine and fineally removed from body.
Nephron
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