Hypoxia

Question 1

Hypoxic hypoxia

Answer 1

Insufficient supply of O2 to the body as a whole. As altitude increases, O2 percentage of the atmosphere is constant, but its pressure decreases. The reduced pressure becomes insufficient for the O2 molecules to pass through the respiratory system’s membranes.

Question 2

Hypemic hypoxia

Answer 2

Inability of the blood to carry the O2 molecules. It may be a result of insufficient blood (bleeding or blood donation), anemia or CO poisoning.

Question 3

Histotoxic hypoxia

Answer 3

Inability of the body cells to affectively use the O2 supplied by the blood. This can be caused by use of alcohol or drugs.

Question 4

Stagnant hypoxia

Answer 4

Caused by the blood not flowing efficiently. Can be caused by heart problems, excessive acceleration (Gs), shock or a constricted blood vessel. Cold temperatures can restrict circulation and decrease blood supplied to the extremities.