AP BIOLOGY

THE HUMAN IMMUNE SYSTEM

AIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When HIV destroys most of the T cells and the person becomes very sick, we say they have
A
HIV
B
AIDS
C
STI
D
CVS
Explanation: 

Detailed explanation-1: -AIDS is diagnosed when the CD4 T cell count falls below 200 or you have an AIDS-defining complication, such as a serious infection or cancer.

Detailed explanation-2: -HIV enters its genetic information into helper T cells to make copies of itself. When this happens, the helper T cells die. This severely disrupts the immune response. Low levels of helper T cells mean killer T cells and other white blood cells do not receive as much information about pathogens in the body.

Detailed explanation-3: -A person with HIV is considered to have progressed to AIDS when: the number of their CD4 cells falls below 200 cells per cubic millimeter of blood (200 cells/mm3). (In someone with a healthy immune system, CD4 counts are between 500 and 1, 600 cells/mm3.)

Detailed explanation-4: -Then, HIV kills the CD4 cell and the new HIV copies find other CD4 cells to get inside and start the cycle again. HIV kills immune system cells that help the body fight infections and diseases. The immune system becomes weak when it cannot make enough CD4 cells to fight HIV.

Detailed explanation-5: -Per the Center for Disease Control and Prevention (CDC), one of the indications for the diagnosis of AIDS is when CD4 cell count drops below 200 cells/

There is 1 question to complete.