cd4 t cell

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Word: CD4 T Cell

Part of Speech: Noun

Definition: A CD4 T cell is a type of white blood cell that plays an important role in the immune system. It has a special receptor called CD4 on its surface, which helps it recognize and respond to infections in the body, especially those caused by viruses. When it identifies an infected cell, it sends signals to other immune cells (like B cells and killer T cells) to help fight the infection.

Usage Instructions:

• You can use "CD4 T cell" when talking about the immune system, health, or diseases, especially in the context of infections like HIV/AIDS.

Example Sentence:

• "CD4 T cells are crucial for the immune response, but they can be destroyed by the HIV virus, leading to weakened immunity."

Advanced Usage:

In advanced discussions, you might hear about the importance of CD4 T cells in areas like immunology, vaccine development, or the treatment of autoimmune diseases. For example: - "Researchers are studying how to boost CD4 T cell counts in patients with HIV to improve their immune responses."

Word Variants:

• T cell: Refers to a broader category of immune cells, which includes CD4 T cells and other types like CD8 T cells.
• Helper T cell: Another name for CD4 T cells, highlighting their role in helping other immune cells.

Different Meanings:

In a medical context, "CD4 T cell" specifically refers to this type of immune cell. However, outside of biology or medicine, the term doesn’t have other meanings.

Synonyms:

• Helper T cell (as mentioned)
• Lymphocyte (a broader category that includes T cells)

Idioms and Phrasal Verbs:

There are no specific idioms or phrasal verbs directly related to "CD4 T cell," as it is a technical term. However, in discussions about health, you might encounter phrases like: - "Fight off an infection" - which means to resist or combat an illness, similar to the action of CD4 T cells.

Summary:

A CD4 T cell is a key part of the immune system that helps identify and fight infections.

Academic

Noun

1. T cell with CD4 receptor that recognizes antigens on the surface of a virus-infected cell and secretes lymphokines that stimulate B cells and killer T cells; helper T cells are infected and killed by the AIDS virus

Synonyms

• helper T cell
• helper cell
• CD4 T cell
• CD4 cell