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AQA GCSE Biology Paper 2

  • What are the advantages and disadvantages of a kidney transplant over dialysis?
    Kidney transplants are a cure, but they can be rejected. Patients are treated with immunosuppressants. People are not always on the donor list, relati...
  • What is reaction time affected by?
    Age, drugs e.g. caffeine or gender
  • What is a relay neurone?
    Neurones that carry impulses from the sensory neurone to the motor neurone.
  • What is the cornea?
    Outer transparent layer, bends/refracts light into the eye
  • What is produced as a waste product of deamination?
    Ammonia is produced as a waste product. Ammonia is toxic so it is converted into urea in the liver.
  • What are hormones?
    Chemical messengers that travel in the blood to target organs.
  • What makes up the central nervous system?
    The brain or spinal cord
  • What is short sightedness (myopia)? How do you treat it?
    People are unable to focus on FAR objects. This occurs when the lens is the wrong SHAPE and refracts the light too much. The image is brought into foc...
  • What does insulin do?
    It makes the liver convert glucose into glycogen. This causes blood glucose levels to decrease.
  • What is the nervous system?
    It is a system that allows you to react to your surroundings.
  • What is the role of progesterone in the menstrual cycle?
    Produced by the ovary by the remains of the follicle. Maintains the lining of the uterus. When the level of progesterone falls the lining of the uteru...
  • What is type I diabetes?
    When the pancreas produces little or no insulin.
  • What are the pros and cons of IVF?
    PRO: Gives an infertile couple a child.CON: Multiple births, these are risky, more chance of still birth and miscarriage.CON: Success rate is lowCON:...
  • What is the cerebral cortex?
    The outer wrinkly layer of the brain, controls consciousness, memory and language
  • What are the side effects of the pill?
    Headaches and nausea. Still contract STIs.
  • What is the retina?
    Contains receptor cells called rods and cones. These are sensitive to colour and light intensity.