fl #14 immune system 10bc. antigen- binding sites antigen antibody section 40- 2 figure 40–8...
TRANSCRIPT
Antigen-binding
sites
Antigen Antibody
Section 40-2
Figure 40–8 Structure of an Antibody
bacterium
•The bacterium is an antigen
•Antibodies-protein that helps destroy pathogens
Has 2 antigen binding sites Pathogen invades bodyAntigens on pathogen recognized by some B cells
Specific DefensesA. Humoral immunity-Immunity against pathogens in the body fluids (blood & lymph)
1-B cells (WBC) lymphocyte-produce antibodies
Antigen/antibodies2- Activated B cells grow and
divide rapidly (a million)3-Produce specialized B cells-
plasma cells (T cells help with this also)
4-Plasma cells-release antibodies into the blood to attack the pathogen causing infection
When a person receives a vaccine(shot) their body
create plasma cells (B cells) that can produce antibodies against a specific pathogen. (flu, polio, hepatitis)
Inflammatory ResponsePathogens detectedMillions of WBC’s produced to
fight infectionBlood test reveals increase in
WBC’s-body is dealing w/ a serious infection
Immune system releases chemicals that increase core temperature
FEVER- INCREASED body temp
Many pathogens survive in a narrow temp. range
Elevated temp:1) slows down or stops growth of pathogens
2) increase heart rate, WBC’s get to infection quicker
3)Speeds activities of WBC’s & rate of chemical reactions that repair damaged tissues
2. (10b) In the figure below the red bacterium represents a A.Antigen or pathogenB.AntibodyC.Killer T CellD.Antigen binding site
E
3. (10b) Which of the following is the function of antibodies in the immune response?A.Antibodies produce
antibiotics.
B.Antibodies attach to antigens and attract phagocytes which engulf & destroy the antigen.
C.Antibodies produce interferon.
4. (10c) When a person receives a vaccine, his or her body creates a memory thatA.Receives antibodies against a
specific pathogen B.Creates plasma cells that can
produce antibodies against that specific pathogen.
C.Has polio antibodies in the bloodD.Has antipolio killer T cells in
blood