Chapter 22 Flashcards Preview

Higher Human Biology Unit 4 > Chapter 22 > Flashcards

Flashcards in Chapter 22 Deck (11)
Loading flashcards...
1

What changes do cytokines cause?

An increase in blood flow and white blood cells accumulate at site of infection

2

What is clonal selection theory?

Antigen binding leads to repeated lymphocyte division resulting in a clonal population of lymphocytes

3

What are the 2 types of lymphocytes?

T and B

4

How do t lymphocytes distinguish between self and non self?

They have specific surface proteins that allow them to distinguish between the surface molecules of the body's own cells and cells with foreign molecules on their surface

5

What chemical is released by damaged or invaded cells?

Cytokines

6

What is an antigen?

Any foreign molecule that is recognised by and able to elicit a specific response from a lymphocyte

7

What is an antibody?

A y shaped protein molecule which bear receptors that bind to a particle last antigen

8

What are the two types of t lymphocytes?

T helper and cytotoxic T cells

9

What do helper T cells do?

Secrete cytokines which activate phagocytes, tc cells and B cells

10

What do Tc cells do?

Destroy infected cells by several methods including apoptosis

11

What do B cells do?

Produces antibodies that are specific to one antigen and bind with it creating an antigen-antibody complex