Explain how the circulatory and respiratory systems respond to dehydration during movement and outline appropriate first aid interventions. (5 marks)
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- Dehydration affects the circulatory system because fluid loss reduces blood volume. This causes the heart to increase its rate to maintain adequate circulation. As a result, blood becomes thicker and more viscous, making it harder to pump efficiently through vessels.
- The respiratory system responds to dehydration through increased breathing rates. This occurs due to the body’s attempt to maintain oxygen delivery despite reduced blood efficiency. Consequently, airways become dry and gas exchange becomes less efficient, further compromising oxygen delivery.
- These system responses create a cycle of increasing stress during movement. This relationship demonstrates why dehydration severely impacts athletic performance. Therefore, recognizing early signs is crucial for intervention.
- First aid interventions must address both immediate and ongoing needs. This involves ceasing activity immediately and moving to a cool environment. Following this, provide small sips of electrolyte solution rather than plain water.
- Monitoring remains essential because vital signs indicate recovery progress. This process ensures gradual rehydration prevents shock while heart rate returns to normal. Hence, systematic first aid prevents serious complications.
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Sample Answer
- Dehydration affects the circulatory system because fluid loss reduces blood volume. This causes the heart to increase its rate to maintain adequate circulation. As a result, blood becomes thicker and more viscous, making it harder to pump efficiently through vessels.
- The respiratory system responds to dehydration through increased breathing rates. This occurs due to the body’s attempt to maintain oxygen delivery despite reduced blood efficiency. Consequently, airways become dry and gas exchange becomes less efficient, further compromising oxygen delivery.
- These system responses create a cycle of increasing stress during movement. This relationship demonstrates why dehydration severely impacts athletic performance. Therefore, recognizing early signs is crucial for intervention.
- First aid interventions must address both immediate and ongoing needs. This involves ceasing activity immediately and moving to a cool environment. Following this, provide small sips of electrolyte solution rather than plain water.
- Monitoring remains essential because vital signs indicate recovery progress. This process ensures gradual rehydration prevents shock while heart rate returns to normal. Hence, systematic first aid prevents serious complications.