Chapter 17- Part 1: Specific Defenses of the Host

Question 1

What is an activated B cell called?

Answer 1

Large active B cells are called plasma cells.

Question 2

What does an activated B cell do?

Answer 2

B cell produce antibodies, and recognizes specific pathogens.

Question 3

What are the two types of T cells?

Answer 3

CD8+ T Cells (cytotoxic cells)
CD4+ T Cells (Helper T cells)

Question 4

Function of a T killer cell:

Answer 4

Produces a T cell receptor, that recognizes pathogens. Then destroys the infected/abnormal cells by causing apoptosis.

Question 5

What are three different T cell products that kill?

Answer 5

• Perforin
• Granzyme
• Lymphotoxin
• Fas (molecule that enacts programmed cell death)

Question 6

CD4+ T Cells:

Answer 6

• Helper T cells.
• Release signaling proteins that direct the immune system.
• Release hormones called cytokines.

Question 7

Difference between Helper 1 and Helper 2 cell:

Answer 7

> > Helper 1:
- Releases hormones that activate inflammation, cytotoxic T cells and macrophages.
- Good against small pathogens.

> > Helper 2:
- Releases hormones that stimulate B cell to produce antibodies.
- Good against large pathogens.

Question 8

Th3 CD4+ T cells can also be called:

Answer 8

• CD25+ T cells
• T s
• T reg
  Releases hormones that suppress immune cell activity and inhibit immune responses (anti-inflamatory)

Question 9

Why are CD 8+ T cells important?

Question 10

What happens when a CD 4+ T cell gets activated?

Question 11

Functions of Cytokines (3 examples)

Question 12

What is the only immune hormone that suppressed the immune system ?