1. Immunity Review

2. Explain how wbc’s can protect the body against disease. Wbc’s produce antibodies and memory cells when a pathogen (antigen) enter the body.

3. Give an example of a process that brings about active immunity. Person can come into contact with the pathogen (get sick). A person can get a vaccine.

4. What substances are formed by the human body in response to foreign proteins entering the body? Antibodies

5. An individual who has had chicken pox rarely gets this disease again. What type of immunity is represented? Active Immunity

6. Explain the contents of a vaccine. Dead or weak PATHOGEN

7. How does a measles vaccine protect a child entering school against the measles? Vaccine is injected. The body produces antibodies and memory cells. Antibodies attach to antigens on the pathogen to help kill the pathogen. Memory cells remain in your blood to “remember” the pathogen.

8. Which type of immunity is when your body makes the antibodies after recovering from a disease or getting a vaccination? Passive Immunity

9. The immune system of humans may respond to chemicals on the surface of an invading organism. What are these chemicals on the surface called? Explain what will happen once these chemicals enter the body. Antigens The body will produce anibodies and memory cells.

10. Which substances may form in the human body due to invaders entering the blood? Anibodies and memory cells.

11. 1.What is an allergy? 2.What occurs when someone experiences an allergic reaction? An oversensitivity to a HARMLESS substance. Ex: pollen, dust, peanuts, animal dander The body produces chemicals called HISTAMINES.

12. 1.What pathogen causes AIDS? 2.What is the effect of AIDS on the body? HIV (which is a virus) It weakens the immune system so the body cannot fight pathogens well.

13. Describe cancer. Uncontrolled cell growth A tumor may form.

14. Which statement best describes what happens when someone receives a vaccination? 1.The ability to fight disease will increase due to antibodies received from the pathogen. 2.The ability to fight disease caused by the pathogen will increase due to antibody production. 3.The ability to produce antibodies will decrease after the vaccination. 4.The ability to resist most types of diseases will increase.

15. Which part of the human blood transports hormones and nutrients? 1.plasma 2.platelets 3.red blood cells 4.white blood cells

16. Which activity is not a function of white blood cells in response to a pathogen? 1.engulfing these bacteria 2.producing antibodies to act against this type of bacteria 3.preparing for future invasions of this type of bacteria 4.speeding transmissions of nerve impulses to detect these bacteria

17. The immune system of humans may respond to chemicals on the surface of a pathogen by 1.releasing hormones that break down these chemicals 2.synthesizing antibodies that mark these organisms to be destroyed 3.secreting antibiotics that attach to these organisms 4.altering a DNA sequence in these organisms

18. Vaccinations help prepare the body to fight invasions of a specific pathogen by 1.inhibiting antigen production 2.stimulating antibody production 3.inhibiting white blood cell production 4.stimulating red blood cell production

19. Which statement best describes an immune response? 1. It always produces antibiotics. 2. It usually involves the recognition and destruction of pathogens. 3. It stimulates asexual reproduction and resistance in pathogens. 4. It releases red blood cells that destroy parasites.

20. Which phrase does not describe a way the human body responds to fight disease? (1) destruction of infectious agents by white blood cells (2) production of antibodies by white blood cells (3) increased production of white blood cells (4) production of pathogens by white blood cells

21. A person with AIDS is likely to develop infectious diseases because the virus that causes AIDS (1) destroys cancerous cells (2) damages the immune system (3) increases the rate of antibody production (4) increases the rate of microbe destruction

22. In some individuals, the immune system attacks substances that are usually harmless, resulting in 1. an allergic reaction 2. a form of cancer 3. an insulin imbalance 4. a mutation