PADI Physiology Practice Review Test.
How do you avoid dead air space problems? - CORRECT ANSWER Breathe slowly and deeply.
How do skin divers prepare for a breath hold dive? - CORRECT ANSWER They use deep-stomach
breathing
What is the name of the lung overexpansion injury that occurs when a lung collapses?
a) pneumothorax
b) subcutaneous emphysema
c) air embolism
d) convulsion - CORRECT ANSWER a) pneumothorax
If a diver complains of DCI symptoms immediately on reaching the surface, what is the most likely
cause? - CORRECT ANSWER A lung overexpansion injury
What is the blanket term that covers both lung overexpansion injuries and Decompression sickness? -
CORRECT ANSWER Decompression Illness
What is the first aid procedure for a lung overexpansion injury? - CORRECT ANSWER Contact emergency
medical servicesKeep the patient lying level, administer Oxygen ( 100 pct. if possible ) and monitor the
patients breathing.
Why do you feel discomfort in your ears while descending? - CORRECT ANSWER Pressure pushing your
eardrum and surrounding tissues inwards.
What part of the ear is most affected while descending? - CORRECT ANSWER The middle ear
What symptoms are likely if you were to rupture your ear drum? - CORRECT ANSWER It can cause
severe vertigo
,If you are having difficulty with ear equalization, and you blow too hard against a pinched noseyou could
cause what injury? - CORRECT ANSWER A round window rupture.
If a diver had a tight neck seal, what would be the likely cause of light headedness? - CORRECT ANSWER
Carotid sinus reflex
On a hot day, a diver in a full suit is complaining of nausea. He is sweating and has cool, clammy skin. Is
he suffering from Heat Stroke.. OR Heat Exhaustion? - CORRECT ANSWER He is suffering from Heat
Exhaustion. Heat Stroke is worse than Heat Exhaustion. With heat stroke, there would be no more
sweating, and the diver would have dry skin.So remember! Stroke is worse than Exhaustion.
What is a pressure related injury called? ( It can happen on both ascent and descent ) - CORRECT
ANSWER Barotrauma. If we were to analyse this word.. we have Bar ( pressure ) and Trauma ( Injury )So,
put them together and we have Barotrauma = Pressure related injury.
What is the name given to tiny bubbles of Nitrogen that can found in a divers blood after a dive,
although no symptoms can be found ? - CORRECT ANSWER Silent Bubbles.
If a diver complains of difficulty breathing, tingling, and numbness almost immediately after a dive they
most probably have?
a) decompression sickness
b) seasickness
c) vertigo
d) lung over expansion injury - CORRECT ANSWER d) lung over expansion injury
Excessive voluntary hyperventilation can cause ____________ while involuntary hyperventilation can
cause ________________?
a) Hypoxia, Hypercapnia
b) Hypercapnia, Hypocapnia
, c) Hypocapnia, Hypercapnia
d) Hyperoxia, Hypoxia - CORRECT ANSWER c) Hypocapnia, Hypercapnia
Which of the following lung over expansion injuries is most likely to result in stroke like symptoms?
a) air embolism AGE
b) Pneumothorax
c) Mediastinal emphysema
d) Subcutaneous emphysema - CORRECT ANSWER arterial gas embolism AGE
___________ is a substance contained within the _____ blood cells that aids in the transportation of
oxygen throughout the system.
a. Hemoglobin / red
b. Plasma / red
c. Cholesterol / red
d. Hemoglobin / white - CORRECT ANSWER a. Hemoglobin / red
Carbon monoxide bonds with hemoglobin over _____ times faster than oxygen can and it may take
_______ for the circulatory system to eliminate it
a. to 10 hours
b. to 12 hours
c. to 12 hours
d. to 9 hours - CORRECT ANSWER b. to 12 hours
The lung over expansion injury characterized by air accumulation over the heart is:
a. Arterial Gas Embolism
How do you avoid dead air space problems? - CORRECT ANSWER Breathe slowly and deeply.
How do skin divers prepare for a breath hold dive? - CORRECT ANSWER They use deep-stomach
breathing
What is the name of the lung overexpansion injury that occurs when a lung collapses?
a) pneumothorax
b) subcutaneous emphysema
c) air embolism
d) convulsion - CORRECT ANSWER a) pneumothorax
If a diver complains of DCI symptoms immediately on reaching the surface, what is the most likely
cause? - CORRECT ANSWER A lung overexpansion injury
What is the blanket term that covers both lung overexpansion injuries and Decompression sickness? -
CORRECT ANSWER Decompression Illness
What is the first aid procedure for a lung overexpansion injury? - CORRECT ANSWER Contact emergency
medical servicesKeep the patient lying level, administer Oxygen ( 100 pct. if possible ) and monitor the
patients breathing.
Why do you feel discomfort in your ears while descending? - CORRECT ANSWER Pressure pushing your
eardrum and surrounding tissues inwards.
What part of the ear is most affected while descending? - CORRECT ANSWER The middle ear
What symptoms are likely if you were to rupture your ear drum? - CORRECT ANSWER It can cause
severe vertigo
,If you are having difficulty with ear equalization, and you blow too hard against a pinched noseyou could
cause what injury? - CORRECT ANSWER A round window rupture.
If a diver had a tight neck seal, what would be the likely cause of light headedness? - CORRECT ANSWER
Carotid sinus reflex
On a hot day, a diver in a full suit is complaining of nausea. He is sweating and has cool, clammy skin. Is
he suffering from Heat Stroke.. OR Heat Exhaustion? - CORRECT ANSWER He is suffering from Heat
Exhaustion. Heat Stroke is worse than Heat Exhaustion. With heat stroke, there would be no more
sweating, and the diver would have dry skin.So remember! Stroke is worse than Exhaustion.
What is a pressure related injury called? ( It can happen on both ascent and descent ) - CORRECT
ANSWER Barotrauma. If we were to analyse this word.. we have Bar ( pressure ) and Trauma ( Injury )So,
put them together and we have Barotrauma = Pressure related injury.
What is the name given to tiny bubbles of Nitrogen that can found in a divers blood after a dive,
although no symptoms can be found ? - CORRECT ANSWER Silent Bubbles.
If a diver complains of difficulty breathing, tingling, and numbness almost immediately after a dive they
most probably have?
a) decompression sickness
b) seasickness
c) vertigo
d) lung over expansion injury - CORRECT ANSWER d) lung over expansion injury
Excessive voluntary hyperventilation can cause ____________ while involuntary hyperventilation can
cause ________________?
a) Hypoxia, Hypercapnia
b) Hypercapnia, Hypocapnia
, c) Hypocapnia, Hypercapnia
d) Hyperoxia, Hypoxia - CORRECT ANSWER c) Hypocapnia, Hypercapnia
Which of the following lung over expansion injuries is most likely to result in stroke like symptoms?
a) air embolism AGE
b) Pneumothorax
c) Mediastinal emphysema
d) Subcutaneous emphysema - CORRECT ANSWER arterial gas embolism AGE
___________ is a substance contained within the _____ blood cells that aids in the transportation of
oxygen throughout the system.
a. Hemoglobin / red
b. Plasma / red
c. Cholesterol / red
d. Hemoglobin / white - CORRECT ANSWER a. Hemoglobin / red
Carbon monoxide bonds with hemoglobin over _____ times faster than oxygen can and it may take
_______ for the circulatory system to eliminate it
a. to 10 hours
b. to 12 hours
c. to 12 hours
d. to 9 hours - CORRECT ANSWER b. to 12 hours
The lung over expansion injury characterized by air accumulation over the heart is:
a. Arterial Gas Embolism
