Respiratory changes

Which gas causes decompression sickness?

• Nitrogen

• Oxygen

• Carbon dioxide

• Helium

What is recommended to resurface?

• To have a controlled ascent

• To ascend at 20 meters per minute

• To have a quick ascent

• To keep a steady speed

What are some signs / symptoms of decompression sickness?

• Stomach pain

• Itching skin

• Aching joints

• All of them

Which organs might get affected?

• Brain

• Kidneys

• Spleen

• Liver

Where are peripheral chemoreceptors located?

• Femoral arteries

• Radial arteries

• Aorta

• Iliac arteries

How much arterial oxygen is needed to stimulate peripheral chemoreceptors?

• Less than 30

• Less than 60

• Less than 90

• Less than 120

Why do kidneys increase the elimination of hydrogen ions?

• To increase ph

• To multiply the ph

• To normalize ph

• They don't eliminate hydrogen ions

Which organ produces erythropoietin?

• Liver

• Stomach

• Spleen

• None