Chapter 6: Diving Physiology

65 Questions

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Diving Quizzes & Trivia

Chapter 6 of the SSI Divecon course


Questions and Answers
  • 1. 
    Name some symptoms of hypoxia.
  • 2. 
    Name some symptoms of hypercapnia.
  • 3. 
    Name symptoms of hyperventilation.
  • 4. 
    Why does Carbon Monoxide Poisoning lead to hypoxia?
  • 5. 
    Name some risk factors of DCS.
  • 6. 
    Name some ways to prevent DCS.
  • 7. 
    List symptoms of possible DCI
  • 8. 
    The two cavities on top of the heart are called _____ .
  • 9. 
    The two cavities on the bottom of the heart are called ___.
  • 10. 
    These carry oxygen-rich blood from the heart to the rest of the body.
    • A. 

      Veins

    • B. 

      Arteries

    • C. 

      Capillaries

    • D. 

      Blood

  • 11. 
    These carry oxygen-depleted blood back to the heart.
    • A. 

      Blood

    • B. 

      Capillaries

    • C. 

      Arteries

    • D. 

      Veins

  • 12. 
    These are smaller blood vessles that connect the other vessels.
    • A. 

      Capillaries

    • B. 

      Veins

    • C. 

      Arteries

  • 13. 
    __________________ is the process of gas exchange that occurs in the longs every time you breathe.
  • 14. 
    ____ Is an inert gas that is not used by the body.
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      Nitrogen

  • 15. 
    Why do we breathe?
    • A. 

      Because we need more oxygen

    • B. 

      To rid ourselves of excess carbon dioxide

    • C. 

      We do so automatically, regardless of any stimulus

  • 16. 
    The total volume of air that the lungs can hold is called:
    • A. 

      Tidal Volume

    • B. 

      Total Lung Capacity

    • C. 

      Vital Capacity

    • D. 

      Dead Air Space

    • E. 

      Residual Volume

  • 17. 
    The volume of air moved in and out of the lungs during one breath.  This changes if at rest or during exertion. 
    • A. 

      Dead Air Space

    • B. 

      Vital Capacity

    • C. 

      Tidal Volume

    • D. 

      Total Lung Capacity

    • E. 

      Residual Volume

  • 18. 
    The greatest volume of air that can be moved in and out of the lungs in one maximal breath.
    • A. 

      Vital Capacity

    • B. 

      Total Lung Capacity

    • C. 

      Dead Air Space

    • D. 

      Residual Volume

    • E. 

      Tidal Volume

  • 19. 
    The volume of air that remains in the lungs after a maximal exhalation.
    • A. 

      Dead Air Space

    • B. 

      Tidal Volume

    • C. 

      Vital Capacity

    • D. 

      Total Lung Capacity

    • E. 

      Residual Volume

  • 20. 
    The volume of air that exists in the mouth and windpipe, which is not usable by the respiratory system.
    • A. 

      Total Lung Capacity

    • B. 

      Tidal Volume

    • C. 

      Dead Air Space

    • D. 

      Residual Volume

    • E. 

      Vital Capacity

  • 21. 
    A lack of oxygen in the body's tissues is called:
    • A. 

      Hypercapnia

    • B. 

      Lipoid Pnemonia

    • C. 

      Hyperventilation

    • D. 

      Hypoxia

  • 22. 
    What might cause hypoxia?  Check all that apply.
    • A. 

      Not breathing, such as running out of air or near drowning.

    • B. 

      Ascending too fast

    • C. 

      Tissues cannot process oxygen for some reason.

    • D. 

      Insufficient saftey stops

  • 23. 
    When a person is showing signs of hypoxia, give them 100% oxygen.
    • A. 

      True

    • B. 

      False

  • 24. 
    __________ is an exceess of carbon dioxide in the body's tissues.
    • A. 

      Hypoxia

    • B. 

      Hyperventilation

    • C. 

      Lipid Pnemonia

    • D. 

      Carbon Monoxide Poisoning

    • E. 

      Hypercapnia

  • 25. 
    ____ can occur when divers try to stretch their air supply by skip breathing.
    • A. 

      Hyperventilation

    • B. 

      Hypoxia

    • C. 

      Carbon Monoxide Poisoning

    • D. 

      Hypercapnia

    • E. 

      Lipid Pnemonia

  • 26. 
    It is necessary to offer a diver 100% oxygen if he is showing signs of hypercapnia.
    • A. 

      True

    • B. 

      False

  • 27. 
    ____ is the result of breathing more than necessary.
    • A. 

      Hyperventilation

    • B. 

      Hypoxia

    • C. 

      Lipid Pnemonia

    • D. 

      Hypercapnia

    • E. 

      Carbon Monoxide Poisoning

  • 28. 
    New divers may hyperventilate due to anxiety.
    • A. 

      True

    • B. 

      False

  • 29. 
    ___ usually happens when compressed air has been tainted because the compressor drew in its own exhaust.
    • A. 

      Hyperventilation

    • B. 

      Carbon Monoxide Poisoning

    • C. 

      Hypercapnia

    • D. 

      Lipid Pnemonia

  • 30. 
    Carbon Monoxide Poisoning leads to tissue hypoxia.
    • A. 

      True

    • B. 

      False

  • 31. 
    If you suspect carbon monoxide poisoning, 100% oxygen should be administered.
    • A. 

      True

    • B. 

      False

  • 32. 
    ___ is caused by breathing air tainted with oil.
    • A. 

      Carbon Monoxide Poisoning

    • B. 

      Lipid Pneumonia

    • C. 

      Hypoxia

    • D. 

      Hyperventilation

    • E. 

      Hypercapnia

  • 33. 
    Victims of lipid pneumonia require immediate attention at a medical facility.
    • A. 

      True

    • B. 

      False

  • 34. 
    As a result of ______, on descent, air spaces in the body and in equipment will be compressed.
    • A. 

      Henry's law

    • B. 

      Charles' Law

    • C. 

      Boyle's Law

    • D. 

      Dalton's Law

  • 35. 
    A small amount of blood in a diver's mask is a sign of what?
    • A. 

      Sinus squeeze

    • B. 

      Ear Squeeze

    • C. 

      Tooth Squeeze

    • D. 

      Mask Squeeze

    • E. 

      Dry Suit Squeeze

  • 36. 
    Due to ____, when you ascend, air will expand and must be released from the lungs.  Otherwise, an overexpansion injury can occur.
    • A. 

      Boyle's Law

    • B. 

      Henry's Law

    • C. 

      Charles' Law

    • D. 

      Dalton's Law

  • 37. 
    Breath holding while ascending is likely to cause...
    • A. 

      Sinus squeeze

    • B. 

      Pulmonary Barotrauma

    • C. 

      Hypoxia

    • D. 

      A reverse block

  • 38. 
    On ascent, if the eustachian tube is blocked, it may cause______
    • A. 

      Pulmonary Barotrauma

    • B. 

      Ear Squeeze

    • C. 

      A reverse block

    • D. 

      Sinus Squeeze

  • 39. 
    When a sinus block occurs:
    • A. 

      Descend

    • B. 

      Ascend

    • C. 

      Administer 100% oxygen

    • D. 

      Try to equalize

    • E. 

      Be sure to use your SSI Total DiveLog.

  • 40. 
    It is suggested to practice  and build skill and confidence before using a dry suit in leadership diving situations.
    • A. 

      True

    • B. 

      False

  • 41. 
    Besides breath holding on ascent, what other things can cause lung expansion injuries?  Check all that apply.
    • A. 

      Bronchitis / chest cold

    • B. 

      Emphhysema

    • C. 

      Asthma

    • D. 

      A cough or sneeze on ascent

    • E. 

      Tuberculosis

  • 42. 
    ___ is caused by escaped air from the lungs getting into the bloodstream by the capillaries surrounding the alveoli.
    • A. 

      Pneumothorax

    • B. 

      Mediastinal Emphysema

    • C. 

      Subcutaneous Emphysema

    • D. 

      Arterial Gas Embolism

  • 43. 
    Pneumothorax is dangerous because escaped air will enter the heart and brain.
    • A. 

      True

    • B. 

      False

  • 44. 
    A diver suffering from Arterial Gas Embolism will feel terrible, have difficulty breathing, and be noticably different.
    • A. 

      True

    • B. 

      False

  • 45. 
    ___ is caused by air escaping from the lung and becoming trapped between the outer lung covering and the inside of the chest cavity.
    • A. 

      Arterial Gas Embolism

    • B. 

      Pneumothorax

    • C. 

      Mediastinal Emphysema

    • D. 

      Subcutaneous Emphysema

  • 46. 
    ___ Can cause a lung collapse
    • A. 

      Pneumothorax

    • B. 

      Mediastinal Emphysema

    • C. 

      Arterial Gas Embolism

    • D. 

      Subcutaneous Emphysema

  • 47. 
    ___ pneumothorax is when air exits the lung on on exhalation (through a hole), but does not re-enter on inhalation.
  • 48. 
    ____  is when air leaves the lungs and collects in the space around the heart, behind the breastbone.
    • A. 

      Pneumothorax

    • B. 

      Subcutaneous Emphysema

    • C. 

      Arterial Gas Embolism

    • D. 

      Mediastinal Emphysema

    • E. 

      Hypoxia

  • 49. 
    ___ is when air leaves the lungs and collects around the skin under the neck.
    • A. 

      Arterial Gas Embolism

    • B. 

      Subcutaneous Emphysema

    • C. 

      Pneumothorax

    • D. 

      Mediastinal Emphysema

    • E. 

      Hyperventilation

  • 50. 
    ___ causes "rice krispies" under the skin.
    • A. 

      Carbon Monoxide Poisoning

    • B. 

      Pneumothorax

    • C. 

      Arterial Gas Embolism

    • D. 

      Mediastinal Emphysema

    • E. 

      Subcutaneous Emphysema

  • 51. 
    To simplify diagnosis, AGE and DCS should be considered the same, at least initially.
    • A. 

      True

    • B. 

      False

  • 52. 
    Treatment for all lung expansion injuries is 100% pure oxygen.
    • A. 

      True

    • B. 

      False

  • 53. 
    Recompression therapy is required treatment for all lung expansion injuries.
    • A. 

      True

    • B. 

      False

  • 54. 
    In the case of AGE, transport the victim to the nearest recompression chamber.
    • A. 

      True

    • B. 

      False

  • 55. 
    As a result of _____, nitrogen is absorbed and held in the body's tissues in proportion to the ambient pressure.
    • A. 

      Henry's Law

    • B. 

      Dalton's Law

    • C. 

      Boyle's Law

    • D. 

      Charles' Law

    • E. 

      Archimede's Principle

  • 56. 
    At sea level, the average body holds about ___ liter of absorbed nitrogen.
  • 57. 
    Decompression sickness is also called
    • A. 

      DCI

    • B. 

      Caisson's Disease

    • C. 

      Arterial Gas Embolism

    • D. 

      The Bends

  • 58. 
    In diving medicine terminology, all dives are decompression dives.
    • A. 

      True

    • B. 

      False

  • 59. 
    ____ symptoms include pain, itchy skin, burning sensation, and a marbling of the skin.
    • A. 

      Type II Decompression Sickness

    • B. 

      Mediastinal Emphysema

    • C. 

      Type I Decompression sickness

    • D. 

      Carbon Monoxide poisoning

    • E. 

      Subcutaneous Emphysema

  • 60. 
    ___ involves the nervous system, and is more serious.
    • A. 

      Type I DCS

    • B. 

      Type II DCS

  • 61. 
    For either type of DCS, give 100% oxygen.
    • A. 

      True

    • B. 

      False

  • 62. 
    Nitrogen narcosis can occur at this depth and beyond
    • A. 

      10 feet

    • B. 

      33 feet

    • C. 

      60 feet

    • D. 

      100 feet

    • E. 

      130 feet

  • 63. 
    Give fluids for heat stroke.
    • A. 

      True

    • B. 

      False

  • 64. 
    If you have asthma, you absolutely should not dive.
    • A. 

      True

    • B. 

      False

  • 65. 
    All diabetics should be evaluated by a physician before diving.
    • A. 

      True

    • B. 

      False