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LIFE PROCESSES

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LIFE PROCESSES

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  1. Do Now – Write Down Entire Question and AnswersAll life depends on the availability of usableenergy. This energy is released when(1) organisms convert solar energy into thechemical energy found in food molecules(2) respiration occurs in the cells of producersand high-energy molecules enter the atmosphere(3) cells carry out the process of respiration(4) animal cells synthesize starch and carbondioxide

  2. LIFE PROCESSES

  3. What is a living thing? • Imagine that you are space traveler who lands on an unknown planet. How could you determine if what you are looking at is alive.

  4. What are the life processes? • NUTRITION • TRANSPORT • RESPIRATION • EXCRETION • SYNTHESIS • GROWTH • REGULATION • REPRODUCTION

  5. Key Concepts • Metabolism– all the chemical activities an organism must carry on to sustain life. • Homeostasis – the maintenance of a stable internal environment in spite of changes in the external environment.

  6. Nutrition • ingestion - obtaining food from the environment • digestion(processing food for use by the organism). • egestion(removal of solid wastes)

  7. Nutrition - Ingestion

  8. Nutrition - Digestion

  9. Nutrition - Egestion

  10. TRANSPORT • Ability to absorb and circulate materials to the cells. • Oxygen absorbed into the bloodstream • Oxygen circulated to the cells • Oxygen absorbed into the cell

  11. TRANSPORT

  12. RESPIRATION • The process of releasing energy • Glucose (blood sugar) is broken down, and the energy released is stored as ATP. • Energy released by the compound ATP is used to perform life functions.

  13. Plants and animals use the oxygen in the air to turn food into energy. RESPIRATION

  14. RESPIRATION

  15. RESPIRATION • Human Respiratory System

  16. EXCRETION • Removal of cell waste from the organism. • Exhaling, Urinating, Sweating • Wastes include water, carbon dioxide, salts, and nitrogen.

  17. EXCRETION

  18. SYNTHESIS • small molecules combine to form larger ones. • Photosynthesis • CO2 + H2O + sunlight = C6H12O6 + O2

  19. SYNTHESIS • Combining 2 glucose molecules to make a larger maltose molecule

  20. GROWTH • An increase in size • increases in cell size • Increase in cell number. • The raw materials for growth are the products of synthesis.

  21. GROWTH

  22. GROWTH

  23. REGULATION • The control and coordination of life functions.

  24. Nucleus Brain REGULATION

  25. All living things respond to changes. Eg. Plants grow towards the light. Eg. People react to the temperature around them. Stimuli

  26. Stimulus

  27. REPRODUCTION • The production of new individuals. • Necessary for the survival of a species. • Not necessary for the survival of the individual

  28. REPRODUCTION

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