Final answer:
Dehydration refers to water loss from the body without adequate replacement. Signs and symptoms include thirst, dizziness, fainting, headaches, low blood pressure, fatigue, and low to no urine output.
Step-by-step explanation:
Dehydration refers to water loss from the body without adequate replacement. It can result from either water loss or electrolyte imbalance, or, most commonly, both. 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. Signs and symptoms are usually noticeable after about 2 percent of total body water is lost.