The main cellular target of the HIV virus that causes AIDS is
a. Helper T cells
b. Cytotoxic T cells
c. Macrophages
d. B cells

Guida verificata passo dopo passo

Understand the role of the immune system's cells: Helper T cells (CD4+), Cytotoxic T cells (CD8+), Macrophages, and B cells. Each has a specific function in immunity.

Recall that HIV primarily targets cells with CD4 receptors, which are found on Helper T cells. These cells are crucial for coordinating the immune response.

Learn that HIV binds to the CD4 receptor on Helper T cells using its glycoprotein (gp120), allowing the virus to enter and infect these cells.

Understand the consequences of HIV targeting Helper T cells: It leads to a weakened immune system, as these cells are essential for activating other immune cells like Cytotoxic T cells and B cells.

Conclude that the main cellular target of HIV is Helper T cells, as they are the primary site of infection and play a central role in the progression of AIDS.

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HIV and its Mechanism of Infection

HIV (Human Immunodeficiency Virus) primarily targets the immune system, specifically the CD4+ T cells, also known as Helper T cells. These cells play a crucial role in orchestrating the immune response. By infecting and destroying these cells, HIV undermines the body's ability to fight off infections and diseases, leading to AIDS (Acquired Immunodeficiency Syndrome).

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Percorso guidato

2:38

Step 1: Tissue Damage & Infection

Helper T Cells

Helper T cells are a subset of T lymphocytes that are essential for the adaptive immune response. They assist other immune cells by releasing cytokines, which help activate B cells to produce antibodies and cytotoxic T cells to kill infected cells. The depletion of Helper T cells by HIV is a key factor in the progression to AIDS, as it severely compromises the immune system.

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Percorso guidato

4:27

Review of Cytotoxic vs Helper T Cells

Immune System Components

The immune system consists of various cells and organs that work together to defend the body against pathogens. Key components include T cells (both Helper and Cytotoxic), B cells, and macrophages. Each plays a distinct role: B cells produce antibodies, Cytotoxic T cells kill infected cells, and macrophages engulf pathogens. Understanding these components is vital for grasping how HIV affects immune function.

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