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Cancer Research UK found that many people do not realise that obesity is linked to an increased risk of developing cancer - Edexcel - GCSE Biology: Combined Science - Question 6 - 2020 - Paper 1
Question 6
Cancer Research UK found that many people do not realise that obesity is linked to an increased risk of developing cancer. In the body, fat tissue sends signals tha... show full transcript
Worked Solution & Example Answer:Cancer Research UK found that many people do not realise that obesity is linked to an increased risk of developing cancer - Edexcel - GCSE Biology: Combined Science - Question 6 - 2020 - Paper 1
Step 1
Describe how this could cause cancer to develop.
Answer
Fat tissue releases signaling molecules known as adipokines, which can stimulate cell division and affect cell growth. When these signals promote excessive cell proliferation, it increases the likelihood of mutations occurring. These mutations can disrupt normal cellular processes, potentially leading to cancer development as unregulated growth takes place.
Step 3
Determine how the impact of obesity on bowel cancer compares to the impact of obesity on all types of cancer.
Answer
Obesity is a contributing factor in 13% of bowel cancer cases, which is notably significant compared to its link to overall cancer cases (1 in 20). This suggests that the relationship between obesity and bowel cancer may be stronger than with other types, indicating targeted interventions in obesity management may be particularly crucial for reducing bowel cancer risk.