Why is a person likely to feel breathless, nauseous, and dizzy at 12,000 ft. above sea level? A) Lungs retain higher volumes of CO₂ at high altitudes. B) Higher altitudes result in buildup of interstitial fluid and slow down the rate of gas exchange in the alveoli. C) Cold temperatures at higher altitudes damage alveolar walls and reduce the available surface area for oxygen absorption. D) Blood O₂ level decreases due to reduced O₂ diffusion into the blood. E) Partial pressure of CO₂ in the blood increases due to higher partial pressure of CO₂ in the atmosphere.

Question

Quizplus · Accepted Answer

At high altitudes, the partial pressure of oxygen decreases, leading to reduced oxygen diffusion into the blood, which can cause symptoms like breathlessness, nausea, and dizziness.

Why Is a Person Likely to Feel Breathless, Nauseous, and Dizzy