Question

based on the model in figure 1, how are the lower oxygen levels in denver causing the students to struggle more during their workouts and breathe more heavily?

a. the students are not storing enough oxygen, which is used as energy.

b. the students inhale less oxygen with each breath, which causes them to exhale less carbon dioxide.

c. the students inhale less oxygen with each breath, which reduces their production of atp.

d. the students are not storing enough oxygen, which increases their production of atp.

Explanation:

• Option A: Oxygen isn't stored as energy; it's used in respiration to produce ATP, so A is wrong.
• Option B: Lower oxygen intake affects ATP production (energy for workouts), not just CO₂ exhalation, so B is incorrect.
• Option C: At high altitudes (Denver), air has less oxygen. Less inhaled oxygen reduces aerobic respiration, lowering ATP production. Less ATP makes workouts harder, so C is correct.
• Option D: Less oxygen would decrease, not increase, ATP production, so D is wrong.

Answer:

C. The students inhale less oxygen with each breath, which reduces their production of ATP.