Defense against disease

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Defense against disease test

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1. Pathogens are best defined as

2. Phagocytes are the

3. An example of non-infectious disease is

4. A vaccine is an injection which

5. Antibiotics...

6. Which antigens are found in the red blood cells of people who are blood group o?

7. Which blood group(s) can be safely transfused into a person with AB blood?

8. If a person (who doesn't have an identical twin) receives an organ transplant...

9. name and describe two specific barriers or mechanisms in the FIRST line of defense to prevent the entry of pathogens. Briefly explain how they work.

10. If Mary is group A and Jane has neither A nor B antibodies present in the plasma, would a transfusion of blood cells from Jane into Mary work?

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11. Clearly explain one good reason for you answer to Q10.

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Answers

1. Disease causing organisms.

2. white blood cells that surround and break down pathogens.

3. osteoporosis

4. contains dead/weakened pathogens

5. can cure a strong bacterial infection

6. no antigens present

7. A, B, AB and O blood

8. tissue rejection sets in, and this is controlled with immunosuppressive drugs

9. a) mucus and cilia. The nose has cilia and the trachea has mucus, which stops/traps pathogens from entering the body and sweeps up the pathogens respectively

b) eyelashes. Eyelashes act as shields for the eye and prevents pathogens from easily getting into the eye.

10. No

11. Although Jane's blood does contain A antigens, it also contains B antigens as well, which will agglutinate with Mary's blood since it contains B antibodies.