Specific Immune Response: T-Lymphocytes

Question 1

How are T-lymphocytes activated in phagocytosis?

Answer 1

phagocyte presents pathogens antigen on its cell membrane (antigen presenting cell)

Question 2

What are the three types of T-lymphocytes?

Answer 2

T-helper cells - release interleukins which activated T-killer cells and B-lymphocytes
T-killer cells - kill pathogens
T-regulator cells - stop T-killer cells from destroying other WBC’s e.g. antigen presenting cells

Question 3

What does each type of T-cell have?

Answer 3

different protein receptor which is complimentary to a specific antigen

Question 4

What is clonal selection?

Answer 4

only T-cells (or B-cells) that bind to complementary antigens
will divide and reproduce

Question 5

What is clonal expansion?

Answer 5

T-cell or B-cell that is selected divides by mitosis

to make many clones of itself - will have complimentary protein to antigen