Pathogens, Disease, Immunity

Select the word which means 'organism that causes disease'.

• microorganism

• microbe

• pathogen

• parasite

Select the things where pathogenic baceria might be found.

• faeces only

• vomit only

• rotting food only

• faeces, vomit and rotting food

Write down the toxic susbtances bacteria produce which harm the host's body.

Select another way bacteria cause disease.

• growing, dividing and multiplying

• shrinking, dividing and multiplying

• growing, dying and multiplying

• growing, dividing and reducing

Many bacteria can grow, divide and multiply in 20 minutes. Calculate how many bacteria can be produced form a single bacterium in one hour.

Select how harmful bacteria can enter the body.

• 1. 1 Through contaminated food and drink only.

• 2 Through breaks in skin only.

• 1 and 2 only

• 1, 2 and by breathing in infected air.

Select the barrier which does not help to keep pathogens outside of the body.

• skin

• mucus

• clothes

• hairs

Select something white blood cells produce to destroy pathogens.

• Antibiotics

• Antibodies

• Antigens

• Antidotes

Select another way white blood cells destroy bacteria.

• Avoid and build up.

• Avoid and break down.

• Surround and build up.

• Surround and break down.

Seelct the correct explanation for why we need a specific antibody for each particular type of harmful bacteria.

• Antibodies are specific to antigens.

• Antibodies are specific to antibiotics.

• Antibodies are specific to antidotes.

• Antibodies are specific to anticlockwise.