A hiker experiences altitude sickness while climbing a mountain. Which physiological adaptation contributes to this condition?
Q1. A hiker experiences altitude sickness while climbing a mountain. Which physiological adaptation contributes to this condition?
Answer: Decreased lung function
Explanation: Decreased lung function at high altitudes leads to inadequate oxygen delivery to the brain and other tissues, causing altitude sickness. Incorrect options: increased red blood cell count helps adapt to high altitudes; slowed heart rate is a response to high altitudes to conserve energy; increased blood pressure is not a direct contributor to altitude sickness.