Which of the following is a potential consequence of dehydration?

Dehydration can lead to an increased body temperature because the body relies on water for thermoregulation. When dehydration occurs, the body's ability to sweat and release heat is compromised, leading to an elevation in core temperature. As the body loses fluids, the blood becomes thicker, making it more challenging for the heart to pump blood efficiently, which can also add stress and result in a faster heart rate instead of a decreased one.

The other options relate to positive physiological responses. Decreased heart rate typically occurs when the body is well-hydrated and conditioned, enhancing efficiency. Enhanced muscle recovery and improved reaction time are also benefits associated with adequate hydration and overall fitness, not consequences of dehydration. Therefore, increased body temperature stands out as a direct and negative consequence of being dehydrated, highlighting how crucial proper hydration is for maintaining optimal bodily functions during physical activities.