Immunity

Question 1

Defence

Answer 1

Body has non-specific (barriers / phagocytes)
Specific (lymphocytes)

Ways to fight against infection

Question 2

Recognising your own cells

Answer 2

Lymphocytes must be able to distinguish between self and non-self.
Proteins on the surface of cells allow the cells to be distinguished from one another.
The immune system can identify:
Pathogens
Non self materials such as as cells from other organisms
Toxins
Cancer cells

Question 3

Pathogens

Answer 3

Micro organisms that cause disease
Damage cells/tissues
Produce toxins