A 17-year-old basketball player experiences muscle fatigue during a game. What physical phenomenon explains the buildup of waste products that contribute to this fatigue?
Q1. A 17-year-old basketball player experiences muscle fatigue during a game. What physical phenomenon explains the buildup of waste products that contribute to this fatigue?
Answer: Concentration gradient of lactic acid
Explanation: Correct: Concentration gradient of lactic acid accumulates during intense exercise, causing fatigue. Tempting option B fails because it relies on waste product buildup, not increased ATP production or temperature regulation.