Cholera is a disease that can be caused by drinking contaminated water - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
Question 1
Cholera is a disease that can be caused by drinking contaminated water.
(a) (i) Complete the sentence by putting a cross (X) in the box next to your answer.
Choler... show full transcript
Worked Solution & Example Answer:Cholera is a disease that can be caused by drinking contaminated water - Edexcel - GCSE Biology - Question 1 - 2013 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
Cholera is caused by a bacterium. (A) is the correct answer.
Step 2
The Salmonella bacterium is a pathogen which can be spread by contaminated
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Answer
food.
Step 3
Influenza is caused by
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Answer
viruses in the air.
Step 4
Describe how pathogens are prevented from entering the human body.
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Answer
Pathogens are prevented from entering the human body through various mechanisms. For example, the skin acts as a physical barrier, preventing pathogens from penetrating. Additionally, mucus in the respiratory tract traps pathogens, and substances like lysozymes in tears attack bacterial cells, therefore helping in eliminating potential threats.
