Answer:
Cold temperature slows down the diffusion of molecules and slows down the chemical reactions in the muscles, including the activity of acetylcholine (Ach), calcium (Ca2+), sodium (Na+), and potassium (K+) ions. This affects the electrical and chemical signals that control muscle contractions and can lead to stiffness and decreased muscle function.In particular, the activity of Ach, which is responsible for transmitting signals from the nerve to the muscle, is decreased in the cold. This can result in decreased muscle activation and weakened contractions. The activity of Ca2+ ions, which play a critical role in muscle contraction, is also impacted by the cold. Sodium and potassium ions are involved in maintaining the resting potential and action potential of muscle cells, and their movements can be affected by changes in temperature, leading to changes in muscle function.Overall, the cold temperature can have a negative impact on muscle function and may increase the risk of injury.