Physical and non specific defences

Question 1

what do the lungs do as a barrier against dangerous microbes

Answer 1

cells produce mucus which traps dust and germs- cilia move the mucus upwards.

Question 2

what do hair folicles as a barrier against dangerous microbes

Answer 2

glands in the skin make an antiseptic oil

Question 3

what do cuts do as a barrier against dangerous microbes

Answer 3

when cut the blood forms a clot, which develops a scab to prevent entry of bacteria

Question 4

what do eyes do as a barrier against dangerous microbes

Answer 4

tear glands make an antiseptic fluid which kills germs

Question 5

what does the stomach do as a barrier against dangerous microbes

Answer 5

acid made by the lining kills the germs

Question 6

what does the skin do as a barrier against dangerous microbes

Answer 6

dead outer layer forms a barrier against germs

Question 7

what are phagocytes

Answer 7

these are the type of white blood cells that ‘mop up’ infected cells and pathogens that have entered the body. These cells go around ingesting then digesting microbes.

Question 8

What do lymphocytes do

Answer 8

these are cells that produce antibodies. when it encounters a microbe it will produce antibody molecules, these join on to a a specific part of the microbe called the antigen.
This causes the microbe to instantly rupture.

Question 9

What happens when you get chicken pox for example

Answer 9

when you get a disease once, your immune system produces a special cell called memory cells. This makes sure you dont get the same disease twice.

Question 10

What are antibiotics

Answer 10

Antibiotics are group of chemicals that stop bacterial growth.
These are most commonly used to treat infections.
These are prescribed by doctors as tablets, creams and medicines.
The first antibiotic was discovered by Alexander Fleming.