Final answer:
Light-colored and diluted urine is not a sign of dehydration; instead, symptoms like weakness, thirst, dried mucous membranes, rapid pulse, and low blood pressure are indicative of a low-hydration status.
Step-by-step explanation:
The sign or symptom that is not typically associated with dehydration is light-colored and diluted urine. Dehydration usually results in the body conserving water, so the urine would become more concentrated and darker in color. On the other hand, symptoms such as weakness and thirst, dried mucous membranes, and rapid pulse and low blood pressure are indicative of dehydration. These symptoms arise due to the body's response to losing water and the subsequent attempt to maintain homeostasis. Rapid pulse and low blood pressure, for instance, are a result of the body trying to ensure enough blood circulation when the blood volume is decreased. Dehydration can be due to conditions causing excessive water loss such as vomiting, diarrhea, and frequent urination.