Human Defence System

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Where do T lymphocytes mature?

Thymus gland
Do T lymphocytes produce antibodies or not?

Don’t produce antibodies
What are the 4 types of T lymphocytes?
- Helper T cells: stimulate B-cells to produce antibodies
- Killer T cells: cytotoxic cells, produce perforin which causes abnormal body cells to burst.
- Suppressor T cells: turn off immune responses
- Memory T cells: survive a long time to trigger immunity to the same antigen in later years.
What is the function of helper T cells ?

Stimulate B cells to produce antibodies
What is the function of killer T cells?

Cytotoxic cells , produce perforin which causes abnormal body cells to burst.
What is the function of suppressor T cells?

Turn off immune responses
What is the function of memory T cells?

Survive a long time to trigger immunity to the same antigen in later years.
Name 3 parts of the first line of defence? (Non-specific)
- Skin
- Mucous membranes
- Secretions from skin and mucous membranes
Name 3 parts of the second line of defence? (Non-specific)
- Phagocytes
- Defence proteins
- Inflammation
Name two parts of the third line of defence? (specific)
- Monocytes (destroy antigens)
- Antibodies
Which T cell turns off immune responses?

Suppressor cells
Which T cell stimulates B cells to produce antibodies?

Helper cells
Which T cell produce perforin which causes abnormal body cells to burst?

Killer T cells
Which T cell is a cytotoxic cell?

Killer T cells
Which T cell survive a long time to trigger immunity to the same antigen in later years?

Memory T cells.

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jacquelineglynn

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Human Defence System

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Updated

2023-06-02T17:10:53Z

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