Explanation of "CD4 Cell"
Definition:
A CD4 cell is a type of white blood cell, specifically a T cell, that plays an important role in the immune system. It has a special receptor called CD4 on its surface. These cells help the body recognize and fight off infections, especially from viruses. When a CD4 cell detects an infected cell, it sends signals to other immune cells to respond and attack the infection.
Usage Instructions
Use "CD4 cell" when discussing the immune system, especially in the context of diseases like HIV/AIDS.
This term is mostly used in medical or scientific discussions.
Example Sentence
Advanced Usage
In medical research, the health of CD4 cells is often monitored to assess the effectiveness of treatments for various infections and diseases.
"An increase in CD4 cell count can indicate that a patient is responding well to HIV treatment."
Word Variants
Helper T Cells: CD4 cells are often referred to as helper T cells because they help activate other immune cells.
Lymphokines: These are chemical substances secreted by CD4 cells that stimulate other immune cells.
Different Meanings
Synonyms
Helper T cell
T helper cell
Related Terms
T Cell: A broader category of immune cells that includes CD4 cells and others.
B Cell: Another type of immune cell that produces antibodies, which CD4 cells help to stimulate.
Idioms and Phrasal Verbs
While "CD4 cell" does not have idioms or phrasal verbs associated with it, you might encounter phrases like: - "Fight off an infection" - This means to resist or overcome an illness, which relates to the role of CD4 cells in the immune response.
Summary
CD4 cells are essential components of the immune system, helping the body to recognize and respond to infections.