Hyperventilation syndrome causes

Hyperventilation syndrome causes

• A. excess elimination of O2.
• B. excess elimination of CO2.
• C. excess accumulation of CO.
• D. excess accumulation of CO2.

Answer: (B)

The main idea is that when someone hyperventilates, they blow off carbon dioxide from the blood faster than it’s produced by the body. This reduces arterial CO2 levels (hypocapnia), leading to respiratory alkalosis. The alkalosis causes cerebral vasoconstriction and irritability of nerves and muscles, which explains symptoms like dizziness, tingling, and sometimes carpopedal spasm or fainting. Oxygen levels may be normal, but the driving factor is the loss of CO2, not excess oxygen. Excess elimination of O2 doesn’t fit because oxygen is not being removed in excess during hyperventilation; the problem is the loss of CO2. Excess accumulation of CO would require a scenario where CO builds up, which isn’t caused by hyperventilation. Excess accumulation of CO2 would occur with hypoventilation, not hyperventilation.

The main idea is that when someone hyperventilates, they blow off carbon dioxide from the blood faster than it’s produced by the body. This reduces arterial CO2 levels (hypocapnia), leading to respiratory alkalosis. The alkalosis causes cerebral vasoconstriction and irritability of nerves and muscles, which explains symptoms like dizziness, tingling, and sometimes carpopedal spasm or fainting. Oxygen levels may be normal, but the driving factor is the loss of CO2, not excess oxygen.

Excess elimination of O2 doesn’t fit because oxygen is not being removed in excess during hyperventilation; the problem is the loss of CO2. Excess accumulation of CO would require a scenario where CO builds up, which isn’t caused by hyperventilation. Excess accumulation of CO2 would occur with hypoventilation, not hyperventilation.