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Life Processes

Life Processes. What are the characteristics of life?. LIFE PROCESSES. Looking at living things. 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. Ex. A rock and a blade of grass.

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Life Processes

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  1. Life Processes What are the characteristics of life?

  2. LIFE PROCESSES Looking at living things

  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. Ex. A rock and a blade of grass.

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

  5. Key Concepts • Metabolism– The sum total of all the life functions. • Homeostasis – the maintenance of a stable internal environment in spite of changes in the external environment. Ex: Your body sweats in order to maintain a proper internal temperature.

  6. Nutrition • Includes the activities involved in ingestion(obtaining food from the environment) and digestion(processing food for use by the organism). It also includes egestion(removal of solid wastes)

  7. Nutrition - Ingestion

  8. Nutrition - Digestion

  9. Nutrition - Egestion

  10. Nutrition – Egestion in Leukocytes • in which the bacteria, having been ingested and enclosed in a digestive vacuole by the leukocyte, are ejected by the living cellto the outside

  11. TRANSPORT • The absorption of materials through cell membranes and the circulation, or distribution of materials to all the cells of an organism.

  12. Elodea cells Human Circulation TRANSPORT

  13. RESPIRATION • The process of releasing energy from organic molecules for use by cells. • During respiration glucose is broken down, and the energy released is stored in the compound ATP. • Energy released by the compound ATP is used by organisms to perform life functions.

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

  15. EXCRETION • The elimination of cellular waste products from the organism. • These wastes include water, carbon dioxide, salts, and nitrogen-containing compounds.

  16. Urine Sample EXCRETION

  17. SYNTHESIS • Chemical reactions in which small molecules combine to form larger ones. • When big things are made from small things.

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

  19. GROWTH • An increase in size brought about by increases in cell size and cell number. • The raw materials for growth are the products of synthesis.

  20. GROWTH

  21. REGULATION • The control and coordination of life functions. • Responding to changes in the environment to maintain homeostasis. Ex: Your eyes immediately adjusting to the outside light after watching a movie.

  22. Nucleus Brain REGULATION

  23. All living things respond to changes. Living things notice changes in their surroundings and react to them. Eg. Plants grow towards the light. Eg. People react to the temperature around them.

  24. REPRODUCTION • The production of new individuals. • Reproduction is necessary for the survival of a species, or kind of organism.

  25. REPRODUCTION

  26. LIFE PROCESSES VIDEO

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