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B2 Keeping Healthy. Card 2. Questions
1. When we come into contact with harmful
MO’s we have barriers to prevent them getting
in.
Which of the following are barriers against
microbes
A. Your skin produces chemicals
B. Chemicals (enzymes) in tears destroy them
C. Your white blood cells produce antibodies
D. Your skin acts as a physical barrier
E. Some white blood cells destroy microbes
through phagocytosis
F.
2. Which of the following statements are true?
Not all microbes cause disease because…………
1. There are hardly any microbes around us
2. Most microbes don’t cause human disease
3. Our body manages to keep them out
4. Most microbes are found living in liquid
5.
Answers
1. A, B, D.
2. 2,3.
B2. Keeping Healthy. Card 1. Questions
1.
When microbes get inside the body they
can cause symptoms of illness. What 2
things can cause the symptoms?
2. What microbe is this?
What size range do they cover?
3. Can polio and measles be cured using
antibiotics? Explain your answer.
Answers
1. Damage done to body cells and poisons (toxins)
made by the microbes
2. Bacteria range 1-5 micrometers
3. No, because they are illness caused by viruses
B2 Keeping Healthy. Card 4. Questions
1.
Complete the sentences to describe how
white blood cells fight microbes
A …………………………….with foreign ……………..markers
invades your body. The white blood cells make
chemicals called ………………………..which stick to
the markers. Other white blood cells engulf and
…………………the microbe and …………………….This is
called ………………………..
2. Why do we catch on average 3-5 colds a
year?
1.
Answers
microorganism, antigen, antibodies, digest,
antibodies, phagocytosis
2. Viruses cause colds. Colds caused by
different viruses and viruses have a very
high rate of mutation
B2 Keeping Healthy. Card 3. Questions
B
A
1. What does this graph represent
2. Explain what is happening at points A and B
on the graph
3. Name the conditions required for optimum
growth of bacteria
Answers
1. Bacterial growth
2. A= Fastest increase in growth (dividing
every 20 mins) B= Steady phase, growth of
new bacteria equals death of old bacteria