Topic 2 -T lymphocyte response

Question 1

What are lymphocytes?

Answer 1

White blood cells

Question 2

What response are they involved in?

Answer 2

Specific immune response

Question 3

Are they smaller or bigger than lysosomes

Answer 3

Smaller

Question 4

What fills most of the cell?

Answer 4

A nucleus

Question 5

When are they produced?

Answer 5

In the bone marrow before birth

Question 6

What are the 2 types of lymphocytes?

Answer 6

-T lymphocytes (T cells)
-B lymphocytes (B cells)

Question 7

Where do immature T cells mature?

Answer 7

In the thymus

Question 8

Why are immature t cells different from mature cells?

Answer 8

have specific cell surface receptors called T-cell receptors

Question 9

Give 2 features of these receptors.

Answer 9

-a similar structure to antibodies
-specific to one antigen

Question 10

When are t lymphocytes activated?

Answer 10

when they encounter (and bind to) their specific antigen that is being presented by one of the host’s cells

Question 11

What is an antigen-presenting host cell

Answer 11

a macrophage or a body cell that has been invaded by a pathogen and is displaying the antigen on its cell surface membrane

Question 12

How do activated t cells divide to increase in number?

Answer 12

Mitosis

Question 13

These T-lymphocytes differentiate into two main types of T cell, what are they?

Answer 13

-helper T cells
-cytotoxic T cells(also known as killer T cells)