Biology unit 1 - Immune response flow chart summary

A flow chart showing the immune response

HideShow resource information
  • Created by: Tussy
  • Created on: 23-01-12 19:50
Preview of Biology unit 1 - Immune response flow chart summary

First 245 words of the document:

Antigen presentation
- virus
- bacterium surface
- toxin from bacterium
- on phagocyte
- cell infected with virus
- cancerous cell
-If antigen not recognised,
macrophage is ingested.
-becomes antigen-presenting
-secrete cytokine chemicals,
stimulates lymphocytes.
Clonal Selection
- Lymphocyte meets receptor
molecule and binds
- Stimulate lymphocyte to
divide by mitosis Immune response
= B & T lymphocyte
T lymphocytes (T-cells)
-Cytoxin t-cells--bind to
antigens on infecting cell, kills
cell. Releases perforin
proteins, make pore in cell
membrane so water diffuses
- Helper t-cells­ bind to
antigen on infecting cell,
secrete cytokines. Stimulate
white blood cells = speed up T lymphocyte
immune response
- Memory t-cells­ helps
antigen to be indentified
more quickly if reinfected.
Remain in blood.
B lymphocytes (b-cells)
- Plasma cells-- soluble
antibodies, binds to antigens,
antibody-antigen complex Finish
- kills cells
= binding to antigen on virus
and bacteria, attach to cells, sites, stick antibodies
stop spreading infection together in large clumps.
= binding to free toxin Agglutination
proteins, change shape of -Memory B cells--instant
active site supply of plasma cells if the
= link antigens together, same pathogen invades again. Agglutination
each antigen has 2 bonding


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »