If a person were skiing high up in the mountains,she might feel that she is having trouble breathing (getting enough oxygen in her blood).This is because the:
A) thoracic cavity has a difficult time lowering the internal pressure below the lower atmospheric pressure.
B) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is less.
C) lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is greater.
D) physiological dead air space increases and atmospheric pressure decreases.

Question

Quizplus · Accepted Answer

At high altitude, the atmospheric pressure decreases, resulting in lower partial pressure of oxygen (PO2). This lower PO2 creates a smaller diffusion gradient between the blood and the atmosphere, making it difficult for oxygen to diffuse into the blood. This can lead to a feeling of breathlessness or difficulty breathing.

If a Person Were Skiing High Up in the Mountains,she