Biology Chapter 32

Card Set Information

Biology Chapter 32
2011-09-27 20:07:56

Skeletal, Muscular and Integumentary Systems
Show Answers:

  1. Why is cartilage important?
    It acts as a cushin between bones and protects them as they move against each other.
  2. What are the components of the axial skeleton?
    Skull, vetebral column, ribs.
  3. What is the main function of the skull?
    To protect your brain
  4. Where are the Haversian Canals? See p. 924
    In the compact bone layer
  5. Which layer of bone absorbs force on the bone? See p. 924
    A tough layer of connective tissue surrounding a bone
  6. Which types of muscle contract without stimulation from the nervous system?
    Smooth and cardiac muscles
  7. Which type of muscle has the greatest number of mitochondria?
    Skeletal muscles
  8. Which muscles are striated? See photographs on p. 929
    Cardiac & skeletal
  9. Why must enzymes destroy acetylcholine in the neuromuscular junction?
    To prevent the muscle from contracting uncontrollably
  10. What happens when the thin filaments in a muscle slide over the thick filaments?
    The muscle contracts
  11. In the sliding filament model, what would happen if myosin did not attach to actin filaments?
    The muscle would be permanently relaxed
  12. What causes the elbow to bend?
    Bicep muscle contracts
  13. Which structure joins skeletal muscle to bone?
  14. What do ligaments connect to?
  15. What is a common myth about exercise?
    Myth - Exercise increases the number of muscles
  16. What is the most important function of the skin?
  17. What happens when the keratin - producing cells of the skin die?
    A waterproof coating is formed
  18. What makes hair strong and moist?
    Sebaceous Glands
  19. What does human hair and a bird's feather have in common?
    Keratin protein
  20. What are hives?
    Fluid from blood vessels is oozing into surrounding tissue causing swelling
  21. Why are some acnes treated with antibiotics?
    To kill the bacteria trapped in the pores
  22. What is a potential sign of skin cancer?
    • A mole with irregular boarder
    • Sudden change in a mole's apperance
    • A sore that does not heal
  23. Which skin cancer is most likely to spread/metastasize?
  24. What is the root of a hair called?
    Hair follicle