Download Document

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?
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.
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
31.6 Diseases that Weaken the Immune System
CAHSEE
• No iPods, MP3s, or Laptops
• Eat breakfast BEFORE 8 am
– All 10th graders get free breakfast
• Take homework to work on/books
• Bring ID cards!!!!!!
• 2nd period - report to G-5
• 3rd period – report to C-6
• 5th period – report to C-4
31.6 Diseases that Weaken the Immune System
KEY CONCEPT
When the immune system is weakened, the body
cannot fight off disease.
31.6 Diseases that Weaken the Immune System
Leukemia is characterized by abnormal white blood cells.
• Leukemia is cancer of the bone marrow.
– characterized by immature white blood cells
- They are immature so they cannot fight pathogens
– causes weakened immune system
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
31.6 Diseases that Weaken the Immune System
Only cure- is a bone marrow
transplant
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
31.6 Diseases that Weaken the Immune System
• HIV infection leads to AIDS.
dead
T cell
T cell
activated
B cell
antibody
HIV
– HIV reproduces in and destroys T cells.
– The body cannot replace T cells fast enough.
– T cells cannot help in immune responses.
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)
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
31.6 Diseases that Weaken the Immune System
31.6 Diseases that Weaken the Immune System
31.6 Diseases that Weaken the Immune System