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Describe the trend in cases between 2000 and 2010 - Edexcel - GCSE Biology Combined Science - Question 4 - 2016 - Paper 1
Question 4
Describe the trend in cases between 2000 and 2010. People infected with Chlamydia are more likely to be infected with the STI Gonorrhoea. (iii) Explain how people ... show full transcript
Worked Solution & Example Answer:Describe the trend in cases between 2000 and 2010 - Edexcel - GCSE Biology Combined Science - Question 4 - 2016 - Paper 1
Step 1
Describe the trend in cases between 2000 and 2010.
Answer
Between 2000 and 2010, the trend in cases of sexually transmitted infections (STIs) may have exhibited an increase, potentially due to factors such as rising awareness and testing, or actual increases in infection rates. It is important to analyze specific datasets to identify patterns.
Step 2
Explain how people become infected with both Chlamydia and Gonorrhoea.
Answer
Individuals may become infected with both Chlamydia and Gonorrhoea through unprotected sexual intercourse with an infected partner. The presence of one infection can make it easier for the other to take hold, as infections can cause inflammation and mucosal changes that enhance susceptibility.
Step 3
Explain how infection with HIV can lead to AIDS.
Answer
HIV infects and destroys CD4 T cells, which are crucial for the immune system. Over time, this reduces the body’s ability to fight off infections and diseases. If HIV is not treated, it can lead to AIDS, characterized by the occurrence of opportunistic infections and certain cancers, due to the severely weakened immune system.