A 21-year-old football player experiences muscle cramping during a game. Which mechanism is responsible for the rapid accumulation of Ca2+ ions in his muscle cells?
Q1. A 21-year-old football player experiences muscle cramping during a game. Which mechanism is responsible for the rapid accumulation of Ca2+ ions in his muscle cells?
Answer: Passive transport
Explanation: Passive transport, specifically diffusion, allows for the rapid accumulation of Ca2+ ions in muscle cells due to the concentration gradient.