Biology 30s

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Author:
KaZuma_t3
ID:
235970
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Biology 30s
Updated:
2013-09-20 02:54:15
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Biology
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Cells
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  1. Define Homeostasis
    The body's internal environment remaining the same, despite any external environment changes.
  2. What are the 3 main components of a regulatory control system in the body?
    • - control centre
    • - effector
    • - receptor
  3. What are 2 mechanisms that operate to restore homeostasis after infection?
    • - immune system responds to destroy pathogens
    • - skin cells inflame injury site
  4. What are 2 mechanisms by which responses to stimuli are brought about and coordinated?
    • - the nervous system
    • - the hormonal system response
  5. What are 2 ways in which water and ion balance are maintained?
    • - digestive organs = take in and eliminate waste
    • - kidneys = maintain a regulate water and ion balance
  6. What are 2 ways in which the body regulates its respiratory gases during exercise?
    • - the heart rate increases
    • - the breathing rate increases
  7. How did Robert Hooke contribute to the cell theory?
    - discovered substances that are made of boxlike structures called cells by examining slices of cork and other plant tissue using a microscope
  8. How did Anton van Leeuwenhoek contribute to the cell theory?
    - found single-celled organisms using microscope lenses he built
  9. How did Scheiden contribute to the cell theory?
    - developed the theory that all plants were made of cells
  10. How did Schwann contribute to the cell theory?
    - proposed that all animals are made of cells
  11. What are the 3 points in the cell theory?
    • - all cells are made up of one or more cells and the products of those cells
    • - all cells carry on life activities
    • - new cells can only arise from living cells through cell division
  12. What is the function of the cell membrane?
    - gives the cells shape and protection and controls what leaves and enters the cells
  13. What is the function of ribosomes?
    - where protein is built
  14. What is the function of mitochondria?
    - releases energy for the cell to use
  15. What is the function of the golgi body?
    - serve as processing, packaging, and storage centres for the products released in the cell
  16. What is the function of the ER?
    - transports materials throughout the cell
  17. What is the function of chloroplasts?
    - allows plants to make their own food through photosynthesis
  18. What is the function of the cell wall?
    - surrounds the cell, provides strength and structure
  19. What is the function of cytoplasm?
    - contains organelles
  20. What is the function of nucleolus?
    - makes ribosome parts
  21. What is the function of centrioles?
    - involved in cell division in animal cells
  22. What is the function of cilia and flagella?
    - involved in cell movement
  23. What is the function of lysosomes?
    - involved in the digestion of food for the cell
  24. What is the function of the vacuole?
    - digests food and may also serve as a storage site for water
  25. What is the function of nucleus?
    - the control centre of the cell metabolism and reproduction

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