Cells - immune system Flashcards
What are T-lymphocytes?
White blood cells involved in specific immune response.
Where are T-lymphocytes made?
The thymus.
What is the cell-mediated response?
Response involving T-cells and body cells.
What happens in the first stage of B-cell activation?
Antigen binds to the complementary specific receptor.
In the cell-mediated response, cloner helper T-cells differentiate into what 4 different cells?
Some stay as helper T-cells, some stimulate macrophages perform more phagocytosis, some become memory cells, some become cytotoxic T-cells.
What do cytotoxic cells do?
Destroy abnormal or infected cells by releasing a protein which imbeds in the cell membrane making a pore.
What protein does a plasma cell produce?
Antibodies.
What part of the pathogen does a vaccine contain?
The antigen.
What cells is produced when having a vaccine containing a specific antigen?
A memory cell.
Helper T-cells divide by mitosis to become more helper T-cells which stimulate what? (4 answers)
B-cells & Phagocytosis
T memory cells & Cytotoxic T-cells.
What is heard immunity?
The minority of a population being protected due to the majority of the population being vaccinated. This makes the spread of a pathogen less likely to be spread.
What protein do T-killer cells release which imbeds into the cell membrane?
Perforin.
Why is it called the cell-mediated response?
Because T-cells only respond to antigens which are presented on cells (APC), and not antigens detached from cells and within the body fluids.
What 3 main interfaces with the environment allow pathogens to enter the body?
The skin, the gas exchange system & the digestive system.
What process do T-cells divide by?
Mitosis.
What do T-helper cells do?
Stimulate B-cell activation.
