B3 Revision part2

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  • B3
  • Factory Farming (Intensive)
  • In a dialysis machine a person’s blood flows between partially permeable membranes. The dialysis fluid contains the same concentration of useful substances as the blood. This ensures that glucose and useful mineral ions are not lost.
    • The Kidney
      • In kidney transplants a diseased kidney is replaced with a healthy one from a donor. However, the donor kidney may be rejected by the immune system
  • If body temperature is too HIGH: -Sweating (evaporates cooling the surface of the skin) - Blood Vessels dilate which increases blood flow
    • If too LOW: -Muscles contract and relax (shivering) - Blood vessels constrict therefore less energy is lost.
  • To make air move into the lungs the ribcage moves out and up and diaphragm becomes flatter. The movement of air into and out of the lungs is known as ventilation.
    • Ventilation
  • Transpiration Stream
    • xylem tissue transports water and mineral ions from the roots to the stem and leaves, the movement is called the transpiration stream
    • phloem tissue carries dissolved sugars from the leaves to the rest of the plant


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