Environmetal Influences in Animals

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Author:
Anonymous
ID:
146992
Filename:
Environmetal Influences in Animals
Updated:
2012-04-11 05:36:32
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Environmetal Influences Animals Biology
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Description:
Higher Biology - Unit Three - Environmetal Influences in Animals
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  1. What chemicals do animals need?
    • Iron
    • Calcium
    • Vitamin D
  2. What chemicals are harmful to animals?
    • Lead
    • Alcohol
    • Nicotine
    • Thalidamide
  3. What effect does iron have on metabolism / development? What are the symtoms of deficiency / what condition occurs? And how can deficiency be avoided?
    • Iron is needed to make enzymes eg catalase and haemoglobin
    • Anemia - fatigue, dizzyness, yellow eyes, pale skin
    • Eat foods rich in iron eg meat, eggs, fish, green vegetables and cereals
  4. What effect does calcium have on metabolism / development? What are the symtoms of deficiency / what condition occurs? And how can deficiency be avoided?
    • Needed for blood clotting and muscle contraction. Calcium phosphate is in teeth and bones
    • Reduction in growth. Brittle bones. Poor blood clotting
    • Eat foods rich in calcium eg milk, cheese and green vegetables
  5. What effect does vitamin D have on metabolism / development? What are the symtoms of deficiency / what condition occurs? And how can deficiency be avoided?
    • Needed to absorb calcium and phosphate from intestine. Required for bone formation
    • Deficiency leads to deformed bones in young children (Rickets)
    • Eat foods rich in vitamin D eg cod liver oil, egg yolk or full cream milk
  6. What effect does lead have on metabolism / development? What are the symtoms of exposure / what condition occurs? And how can exposure be avoided?
    • Inhibits the action of many enzymes involved in respiration and growth
    • Causes learning difficulties in children
    • Use unleaded petrol
  7. What effect does thalidamide have on metabolism / development? What are the symtoms of exposure / what condition occurs? And how can exposure be avoided?
    • Stops development of limbs during pregnancy
    • Causes limb deformities
    • Do not take thalidamide when pregnant
  8. What effect does alcohol have on metabolism / development? What are the symtoms of exposure / what condition occurs? And how can exposure be avoided?
    • Inhibits oxygen supply of foetus across placenta
    • May retard growth and mental development
    • Do not drink alcohol when pregnant
  9. What effect does nicotine have on metabolism / development? What are the symtoms of exposure / what condition occurs? And how can exposure be avoided?
    • CO reduces oxygen carrying capacity in blood. Nicotine prevents glucose reaching foetal tissues eg brain
    • Growth and mental retardation
    • Do not smoke when pregnant

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