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Chapter 11 Excretion Lesson 1 - Introduction to Excretion

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Chapter 11
Chapter 11 Excretion ,[object Object],[object Object],[object Object]
Chapter 11 Excretion ,[object Object],[object Object],[object Object]
Chapter 11 Excretion ,[object Object],Answer : Main waste products are carbon dioxide, urea, excess water & excess heat. NOT FAECES !!
Chapter 11 Excretion ,[object Object],[object Object],faeces
[object Object],Anabolism : The building up of complex substances from simpler ones with an intake of energy
Example of Anabolism: Synthesis of glycogen from glucose (Chapter 4 pg 57) Glycogen Glucose molecules
Catabolism : The breakdown of complex substances into simpler substances with the release of energy. ,[object Object],[object Object],C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O + Energy enzymes
2) Breakdown of excess amino acids to urea (Deamination) (chpt 6 pg 108) (toxic to cells) urea in urine) amino group ammonia (non toxic,excreted R deamination carbon residue glucose glycogen (stored in liver and muscles) NH 2 -CH-COOH
Metabolism…. ,[object Object],[object Object],WASTE PRODUCTS Therefore, waste products must be excreted from the body become TOXIC!!
Excretory Organs in Man Skin (chpt 12) Lungs (chpt 10) Kidneys (chpt 11) Liver (chpt 6)
Excretory Products in Man ,[object Object],[object Object],excreted mainly via excreted mainly via also thru’ &
Excretory Products in Man 3) Urea 4) Excess Heat excreted mainly via excreted mainly via
Excretory Products in Man 5) Bile Pigments are produced by the breakdown of haemoglobin in Excreted in the faeces

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Chapter 22 Our Impact on the Ecosystem Lesson 1 - Deforestation_Overfishing
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Chapter 22 Ecology Lesson 3 - Water pollution_Conservation
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Chapter 21 Ecology Lesson 2 - Pyramid of numbers biomass_carbon cycle
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Chapter 21 Ecology Lesson 1 - Biotic and abiotic factors
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Chapter 20 Molecular Genetics Lesson 2 - Genes_Transcription and Translation
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Chapter 20 Molecular Genetics Lesson 3 - Genetic Engineering
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Chapter 20 Molecular Genetics Lesson 1 - Structure of DNA
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Chapter 19 Heredity Lesson 4 - Gene chromosome mutations_natural selection
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Chapter 19 Heredity Lesson 1 - Monohybrid Cross and Test Cross
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Chapter 19 Heredity Lesson 5 - Discontinuous and Continuous Variation
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Chapter 11 Excretion Lesson 1 - Introduction to Excretion

  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7. Example of Anabolism: Synthesis of glycogen from glucose (Chapter 4 pg 57) Glycogen Glucose molecules
  • 8.
  • 9. 2) Breakdown of excess amino acids to urea (Deamination) (chpt 6 pg 108) (toxic to cells) urea in urine) amino group ammonia (non toxic,excreted R deamination carbon residue glucose glycogen (stored in liver and muscles) NH 2 -CH-COOH
  • 10.
  • 11. Excretory Organs in Man Skin (chpt 12) Lungs (chpt 10) Kidneys (chpt 11) Liver (chpt 6)
  • 12.
  • 13. Excretory Products in Man 3) Urea 4) Excess Heat excreted mainly via excreted mainly via
  • 14. Excretory Products in Man 5) Bile Pigments are produced by the breakdown of haemoglobin in Excreted in the faeces