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Obesity increases the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Question 1
Obesity increases the risk of a person developing cardiovascular disease. Losing weight can reduce the risk of this disease occurring. Explain why exercise can cause... show full transcript
Worked Solution & Example Answer:Obesity increases the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Step 1
Explain why exercise can cause weight loss.
Answer
Exercise plays a critical role in weight loss as it requires energy expenditure, which is derived from calories stored in the body. When a person exercises, their body taps into these energy reserves, effectively burning calories.
Additionally, regular physical activity increases the metabolic rate, enabling the body to use stored fat for energy. Sweating during exercise further indicates that the body is expending energy and working towards reducing fat levels.
Step 2
Explain how a gastric band helps a person to lose weight.
Answer
A gastric band is designed to assist in weight loss by limiting the amount of food the stomach can hold. When the band is placed around the upper portion of the stomach, it creates a small pouch that reduces the capacity of the stomach. This means that a person feels full after consuming a smaller portion of food.
This restriction leads to a decrease in food intake, promoting smaller meal portions and, consequently, weight loss over time. By effectively controlling hunger signals and reducing appetite, the gastric band aids individuals in achieving their weight management goals.