Final answer:
Signs of dehydration at 10-12% water loss include thirst, dizziness, fainting, headaches, low blood-pressure, fatigue, low to no urine output, and, in extreme cases, loss of consciousness and death.
Step-by-step explanation:
Dehydration refers to water loss from the body without adequate replacement.
Signs and symptoms of dehydration include thirst, dizziness, fainting, headaches, low blood-pressure, fatigue, low to no urine output, and, in extreme cases, loss of consciousness and death.
These signs are typically seen when 10-12% of total body water is lost.