Purpose: This is to help you understand how water gains and losses affect the body.

Instructions: Read the brief case study below and respond to the prompts. Do not respond to the questions one-by-one but create a comprehensive response in which all questions are addressed. Be sure to include in-text citations.

Dylan is working a construction crew in the summer, in Texas. She works a 6 hour shift in the afternoon. She also goes for a 5-6 mile run about 6:30 PM every day. She drinks several gallons of water every day.

• Does this sound like an appropriate amount of water? Too much? Too little? Elaborate on your reasoning. Be sure to take into context other factors in the environment as a part of your response.
• Discuss her water gains and losses. What are the processes by which this occurs?
• What do water and electrolytes do for our bodies? How does Dylan's water intake impact her body?
• Discuss the symptoms of dehydration and hyponatremia? Which, if either, do you think she is in danger of?
• What would you recommend for her to remain healthy as she works through the summer as a member of her construction crew?