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Barometric Pressure and Gas Concentrations Quiz

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Barometric Pressure and Gas Concentrations Quiz

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Questions and Answers

What is the role of arterial chemoreceptors in response to decreased PO2?

Increased ventilation (correct)

Decreased ventilation

Temporary inhibition of respiratory center

Gradual adjustment over days

What is the main effect of blowing off carbon dioxide (CO2) in the body?

Acidosis

Hypoxia

Alkalosis (correct)

Angiogenesis

What is the consequence of hypoxia at 18,000ft above sea level?

Mental proficiency falls to about 50%

Twitching or seizures (correct)

Increased RBC production

Coma

What is the main role of hypoxia-inducible factors (HIFs) in response to low oxygen availability?

Gene activation for energy utilization Signup and view all the answers

How do kidneys respond to hypoxia?

Increased bicarbonate excretion Signup and view all the answers

What is the acute effect of hypoxia at 23,000ft above sea level in unacclimatized individuals?

Seizures leading to coma Signup and view all the answers

What is the 'Ceiling' Altitude in the context of high-altitude acclimatization?

The highest altitude where a person can safely go without experiencing significant problems. Signup and view all the answers

What happens to PCO2 as altitude increases?

PCO2 decreases. Signup and view all the answers

Why does breathing pure oxygen allow a person to go higher in altitude safely?

To increase oxygen saturation in the blood. Signup and view all the answers

What is the most abundant gas in the air?

Nitrogen Signup and view all the answers

At what altitude are you considered to be at the 'aviator ceiling'?

47,000ft Signup and view all the answers

Why does acclimatization occur at higher altitudes?

To adjust to lower oxygen levels at higher elevations. Signup and view all the answers