HIV Biology Standard—Physiology 10e

1. HIV Biology Standard—Physiology 10e

2. HIV/AIDS and the Immune System • HIV (Human Immunodeficiency Virus) is • a type of virus that causes AIDS (Acquired • Immunodeficiency Syndrome) • HIV and AIDS is a disease that effects the • immune system

3. HIV is a virus that once in your blood, • hides in,multiplies in, then kills your • immune system cells (both white blood • cells and T-Cells) HIV infecting and multiplying in a healthy cell. http://www-micro.msb.le.ac.uk/Video/HIV.mov

4. The HIV virus hides and multiplies in T cells. The virus then kills both T-Cells and White Blood cells

5. When the HIV virus kills enough T cells so • that there is less than 200 T-cells per • milliliter of blood, the disease is officially • called AIDS Infected T-Cells

6. Question What would happen if our body did not have any T-cells?

7. AIDSAcquired Immunodeficiency Syndrome • If enough of your white blood cells and T-cells are killed, you soon will be vulnerable to any infection or disease. • Because the immune system is weakened, a common cold or infection can be lethal

8. How is HIV transmitted? Is it transmitted? NO! Through the air NO! On toilet seats NO! By kissing With a handshake NO! • You can become infected if you receive HIV infected • white blood cells found in most body fluids. • The most common way of transmission is through • sexual contact, sharing of infected needles, or any • other blood to blood contact

9. The follow chart predicts the number of AIDS cases for the up coming years. How can you protect yourself?

10. 1. HIV and AIDS are not lethal, does not cause death. Explain in detail what HIV and AIDS effect and why people die when they have HIV or AIDS. 2. Draw an HIV virus and explain in detail what the virus does once it has entered the body. Hand in answers