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31.6 Diseases that Weaken the Immune System SPONGE #3 Why might a person with a compromised immune system be unable to fight off a disease?

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Presentation on theme: "31.6 Diseases that Weaken the Immune System SPONGE #3 Why might a person with a compromised immune system be unable to fight off a disease?"— Presentation transcript:

1 31.6 Diseases that Weaken the Immune System SPONGE #3 Why might a person with a compromised immune system be unable to fight off a disease?

2 31.6 Diseases that Weaken the Immune System SPONGE #3 Why might a person with a compromised immune system be unable to fight off a disease? Their immune system is not fighting off the pathogens. If the body cannot fight off pathogens they will get sick.

3 31.6 Diseases that Weaken the Immune System Table of Contents 31.1 Pathogens and Human Illness (10) –Summary (5) 31.2 Immune System (10) –Summary (5) 31.3 Immune Response(10) –Summary (5) 31.4 Immunity and Technology (10) –Summary (5) 31.6 Diseases that Weaken the Immune System (10) –Summary (5) Sponges (10) TOTAL= 85 pts

4 31.6 Diseases that Weaken the Immune System CAHSEE No iPods, MP3s, or Laptops Eat breakfast BEFORE 8 am –All 10 th graders get free breakfast Take homework to work on/books Bring ID cards!!!!!! 2 nd period - report to G-5 3 rd period – report to C-6 5 th period – report to C-4

5 31.6 Diseases that Weaken the Immune System KEY CONCEPT When the immune system is weakened, the body cannot fight off disease.

6 31.6 Diseases that Weaken the Immune System Leukemia is characterized by abnormal white blood cells. –characterized by immature white blood cells -They are immature so they cannot fight pathogens –causes weakened immune system Leukemia is cancer of the bone marrow.

7 31.6 Diseases that Weaken the Immune System Leukemia leads to opportunistic infections. –occur because white blood cells cannot fight infections –if immune system were healthy, would fight these infections

8 31.6 Diseases that Weaken the Immune System Only cure- is a bone marrow transplant

9 31.6 Diseases that Weaken the Immune System HIV targets the immune system. The human immunodeficiency virus (HIV) is a retrovirus (uses your body to duplicate its DNA) –attacks and weakens the immune system –is transmitted by mixing infected blood with a bodily fluid

10 31.6 Diseases that Weaken the Immune System HIV infection leads to AIDS. HIV T cell dead T cell antibody activated B cell –HIV reproduces in and destroys T cells. –The body cannot replace T cells fast enough. –T cells cannot help in immune responses.

11 31.6 Diseases that Weaken the Immune System Ways to get HIV Sexual intercourse (semen/vaginal fluid) Mother to child (umbilical cord and/or breast milk) Blood to blood contact (sharing needles/blood transfusion)

12 31.6 Diseases that Weaken the Immune System AIDS is acquired immune deficiency syndrome. –several opportunistic infections –Pneumonia –Viral infections –Cancers –tuberculosis –Immune system is worn out –very low amount of T cells –Medicine slows, but does not cure –ALWAYS results in death

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