Cells and The Immune System

?
What are antigens?
A molecule (usually a protein) that can trigger an immune response.
1 of 16
Why do some antigens generate an immune response?
The immune system identifies them as foreign.
2 of 16
What is the function of helper T-cells?
Digest invading cells.
3 of 16
What is the function of plasma cells?
To produce antibodies.
4 of 16
What is the difference between cellular immune response and the humoral immune response?
Cellular= involves T-cells and other immune cells they react with (eg phagocytes) Humoral=involves B-cells, clonal selection and production of monoclonal antibodies.
5 of 16
Give 1 difference (other than speed) between primary and secondary immune response.
Primary= happens the first time a pathogen invades Secondary= happens the second time a pathogen invades.
6 of 16
Define active immunity.
Type of immunity you get when your immune system makes its own antibodies after being stimulated by an antigen.
7 of 16
Define passive immunity.
Type of immunity you get from being given antibodies made by different organisms.
8 of 16
How do vaccines give people immunity?
They contain antigens that cause your body to produce memory cells against a particular pathogen. This makes you immune.
9 of 16
What is herd immunity?
Where unvaccinated people are protected because the occurance of the disease is reduced by the number of people who are vaccinated.
10 of 16
Describe 2 issues surrounding vaccines.
1)vaccines are testedon animals first 2) people don't want to risk the side effects of vaccines.
11 of 16
What is antigenic variation?
When antigens on the surface of a pathogen change.
12 of 16
What does HIV stand for?
Human immunodeficiency virus.
13 of 16
What disease does HIV cause?
AIDS
14 of 16
What does AIDS stand for?
Acquired immunodeficiency syndrome.
15 of 16
Why can't antibiotics be used to treat a virus?
They are designed to target bacterial enzymes and ribosomes which are different to those in humans. Viruses do not have their own enzymes and ribosomes so they use those of the host cell. This means they cannot be targeted with antibiotics.
16 of 16

Other cards in this set

Card 2

Front

Why do some antigens generate an immune response?

Back

The immune system identifies them as foreign.

Card 3

Front

What is the function of helper T-cells?

Back

Preview of the front of card 3

Card 4

Front

What is the function of plasma cells?

Back

Preview of the front of card 4

Card 5

Front

What is the difference between cellular immune response and the humoral immune response?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes resources »