SQA National 5 Geography Practice Exam

Dehydration refers to a condition in which the body does not have enough fluids and water to function properly. This can occur when there is a significant loss of fluids without adequate replacement. It can happen due to various factors, such as not drinking enough water, excessive sweating, illness, or certain medications that can increase fluid loss. When the body is dehydrated, it can lead to various symptoms, including thirst, dry mouth, fatigue, and more serious health issues if not addressed.

The other choices do not accurately define dehydration. An excess of fluids in the body describes overhydration, which is the opposite condition. A process of excessive sweating can contribute to dehydration but does not define it. A temporary loss of appetite may occur for various reasons but does not relate specifically to the absence of fluids in the body.