Removal of urea from blood, adjustment of ions in blood, adjustment of water content in blood
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What is ultrafiltration?
A high filtration is built up which squeezes water, urea, ions and sugar out of blood and into the Bowman's capsule. The membranes between the blood vessels and Bowman's capsule act like filters so big molecules stay in blood
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What is reabsorption?
As the liquid flows along the nephron, useful substances are reabsorbed back into the blood. All of the sugar, sufficient ions and sufficient water is reabsorbed
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What is the releases of waste?
The remaining substances continue out of the nephron, into the ureter and down the bladder as urine
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How can kidneys be damaged?
By infection, genetic problems, accidents
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What are the two treatments for kidney failure?
Regular dialysis, kidney transplant
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What is dialysis?
A person's blood flows alongside a selectively permeable barrier surrounded by dialysis fluid. The fluid has the same concentration of dissolved ions and glucose as healthy blood so they won't be lost from blood. Waste substances diffuse
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What are the advantages and disadvantages of dialysis?
Advantages: keeps you alive. Disadvantages: Expensive, inconvenient, have to spend lots of time in hospital, have to follow carefully controlled diet.
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What are the advantages and disadvantages of transplants?
Advantages: cheaper, more practical, more freedom to patient. Disadvantages: long waiting lists, transplanted kidney could be rejected, more vulnerable to other illnesses
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Other cards in this set
Card 2
Front
What is ultrafiltration?
Back
A high filtration is built up which squeezes water, urea, ions and sugar out of blood and into the Bowman's capsule. The membranes between the blood vessels and Bowman's capsule act like filters so big molecules stay in blood
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