Fighting Disease

Question 1

What type of defences does the body have to stop pathogens entering the body?

Answer 1

Physical and chemical barriers stop pathogens entering the body

Question 2

List some physical barriers that stop pathogens entering the body

Answer 2

Skin, hairs and mucus in the nose and cells in the trachea and bronchi produce mucus that traps pathogens.

Question 3

What are chemical barriers to pathogens?

Answer 3

The stomach produces hydrochloride acid and the eyes produce lysozyme in the tears

Question 4

If pathogens make it into your body, what jumps in to destroy them

Answer 4

Immune system

Question 5

What is the most important part of the immune system?

Answer 5

White blood cells

Question 6

What are B-lymphocytes?

Answer 6

A type of white blood cell

Question 7

Every pathogen has what in its surface?

Answer 7

Antigens

Question 8

What are antibodies?

Answer 8

The antibodies lock on to invading pathogens. Aso it can be found and destroyed by white blood cells. The antibodies are specific to that pathogen and won’t lock on to any other pathogens.