Practice A.2.1 Water and electrolyte balance with authentic IB Sports, exercise and health science (SEHS) exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like core principles, advanced applications, and practical problem-solving. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
State two functions of potassium in exercise physiology.
Identify two consequences of excessive water intake without electrolyte replacement.
Describe the process of osmoregulation during prolonged exercise.
Explain how thermoregulation is influenced by hydration status.
Outline two adaptations in trained endurance athletes that improve fluid and electrolyte efficiency.
Discuss the physiological effects of chronic dehydration on athletic performance and recovery.
What is the main effect of low sodium levels (hyponatremia) during endurance events?
Which is the most common electrolyte lost in sweat during exercise?
Which mechanism causes water to follow sodium during rehydration?
Why is potassium important for recovery after intense training?
Why is sodium essential in maintaining fluid balance during exercise?
An ultramarathon runner overhydrates by drinking excessive plain water without electrolytes. Which condition is most likely to occur?
Which electrolyte is most important for muscle contraction during exercise?
Why do sports drinks often contain carbohydrates as well as electrolytes?
After cycling in hot conditions, why might an athlete experience muscle cramps?