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B3: Quiz 4 – Answers
B3: Quiz 4 – Answers
1)
a) Skin acts as a barrier which prevents pathogens from entering the body
b) Blood contains platelets that causes the blood to clot, which seals the wound and develops into a scab. This prevents the entry of pathogens, thus meaning that an individual does not become infected with any diseases
2) The trachea secretes mucus which catches pathogens (and other particles). The trachea is covered in cilia, which are hair like structures that move mucus to the back of the throat where it is swallowed and taken to the stomach where the pathogens are killed by the very acidic conditions
3) The stomach produces hydrochloric acid, which is a very strong acid. The majority of pathogens that enter the stomach are killed by the hydrochloric acid in the stomach. Pathogens enter the stomach when mucus from the trachea and bronchi is swallowed.
4) The eye produces a chemical called lysozyme, which kills pathogens that are on the eye, thus preventing infections
a) Skin acts as a barrier which prevents pathogens from entering the body
b) Blood contains platelets that causes the blood to clot, which seals the wound and develops into a scab. This prevents the entry of pathogens, thus meaning that an individual does not become infected with any diseases
2) The trachea secretes mucus which catches pathogens (and other particles). The trachea is covered in cilia, which are hair like structures that move mucus to the back of the throat where it is swallowed and taken to the stomach where the pathogens are killed by the very acidic conditions
3) The stomach produces hydrochloric acid, which is a very strong acid. The majority of pathogens that enter the stomach are killed by the hydrochloric acid in the stomach. Pathogens enter the stomach when mucus from the trachea and bronchi is swallowed.
4) The eye produces a chemical called lysozyme, which kills pathogens that are on the eye, thus preventing infections
Questions
1)
a) How does skin reduce the chances of an individual becoming infected with a pathogen?
b) Describe what happens when we cut ourselves and why this is useful for preventing infections.
2) Explain how the trachea prevents pathogens from entering the body. Include a description of the structures in the trachea.
3) Describe how the stomach prevents an individual from being infected with a pathogen.
4) How does the eye prevent infections from pathogens?
1)
a) How does skin reduce the chances of an individual becoming infected with a pathogen?
b) Describe what happens when we cut ourselves and why this is useful for preventing infections.
2) Explain how the trachea prevents pathogens from entering the body. Include a description of the structures in the trachea.
3) Describe how the stomach prevents an individual from being infected with a pathogen.
4) How does the eye prevent infections from pathogens?