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Living for the future
What is a pathogen?
A disease-causing microorganism
A type of disease
One of the main problems with bacteria is that:
They are killed by antibiotics.
They produce toxins.
They cause measles and mumps in young children.
One of the main problems with viruses is that:
They damage the host cell when they reproduce.
They cause cholera and typhoid in refugee camps.
What is one of the functions of white blood cells?
To carry oxygen in the bloodstream.
To produce antigens that destroy pathogens.
To ingest and destroy pathogens.
What is one of the ways that antibiotics work?
They can stop bacteria from reproducing.
They can stop viruses from reproducing
They can stop toxins poisoning the tissues of the host.
What sort of pathogen causes influenza (flu)?
What happens to new medical drugs before they are released?
They are tested in the laboratory, then on volunteers.
They are tested on volunteers, and then in the laboratory.
They are given a scientific name and prescribed straight away.
Which of these is one reason why drug development is so expensive?
The drugs companies want to make very large profits.
The volunteers in clinical trials are paid a lot of money.
Most of the chemicals that are developed by drugs companies do not pass all of the tests.
What is the main reason why we should be careful not to over-use antibiotics?
They are very expensive and the money could be used for other things.
We will kill all the 'friendly' bacteria in our guts so we will have to consume lots of yogurt.
Dangerous strains of resistant bacteria may develop by natural selection.
What can vaccination involve?
Injecting a dead form of the disease to stimulate immunity.
Injecting an inactive form of the disease to stimulate immunity.
Injecting an inactive form of the pathogen to stimulate immunity.
There is no vaccine against the common cold because:
Colds are caused by bacteria, so we can use antibiotics to cure them.
The cold virus mutates too quickly for a vaccine to be effective.
Colds are not usually serious enough for it to be worthwhile developing a vaccine.