B2 - Keeping Healthy

What is an infectious disease?

What are microorganisms?

In good conditions how often can bacteria reproduce?

What three things are needed for bacteria to live?

Describe how antibodies work.

Why are we sometimes ill for days then?

Why do we only catch chickenpox once?

Why do we catch so many colds then?

How does a vaccine work?

Why do vaccine rates have to be almost 100% to be effective?

Why do people not have vaccines?

Why are vaccines not compulsory?

Penicillin can be found in mouldy bread. Why is this?

What is an antibiotic?

Why do we have superbugs?

Why are superbugs so dangerous?

Describe stage one of testing new drugs.

Describe stage 2 of testing for new drugs.

Describe stage 3 of trials for new drugs.

What is a placebo and a control group?

There are three types of clinical trial. Describe them.

When are open-label trials used?

Describe the arteries.

Describe veins.

Describe capillaries.

What is most common cause of a heart attack?

What factors cause heart disease? Name three.

What are lifestyle diseases?

What is blood pressure and what is it used for?

What does homeostasis do?

All control systems have what three things?

What is negative feedback?

What does water homeostasis do to control water levels?

What are the two jobs of the kidneys?

If you have only a little water in your body, what do the kidneys do?

If the body has only a little water, what do the kidneys do?

What's the effect of alcohol on urine?

What effect does the drug Ecstasy have on homeostasis?

How do the kidneys know when to produce concentrated urine?