1.5- Immunity And Imunisations

Question 1

What are the different sorts of white blood cells?

Answer 1

Phagocytes- engulf the pathogens

Lymphocytes- produce antibodies or antitoxins

Question 2

Why can each type of antibody can destroy a particular type of bacterium or virus?

Answer 2

Each type of pathogen has particular antigens with a specific shape on its surface - each type of antibody has a particular shape and can lock onto a particular antigen.
Once the pathogen is coated with antibodies, white blood cells can ingest and kill the pathogens.

Question 3

What does immunisation do?

Answer 3

Can make people immune to a disease without having the disease.

Question 4

What does MMR stand for?

Answer 4

Measles, mumps and rubella

Question 5

How does immunisation work?

Answer 5

A small amount of dead/inactivated pathogen is introduced into your body

Question 6

What barriers does your body have to stop pathogens entering it?

Answer 6

Skin
Tears
Stomach acid
Mucus in the airways
Blood clotting when you cut yourself