B Cell Activation And Humoral Immunity

Question 1

Membrane receptor of B cells

Answer 1

• BCR
• function: to act as receptor for antigens

Question 2

Lymph node position of B and T cells

Answer 2

• B: Outside
• T: inside

Question 3

Connections of B & T Cells

Answer 3

• B: connects to antigens directly on surface of invading bacteria or viruses
• T: connects to antigens on outside of infected cells

Question 4

Tissue distribution of B cells

Answer 4

Germinal ctrs of lymph nodes

Spleen

Gut

Respiratory tract

Subcapsular & medullary cords of lymph nodes

Question 5

Tissue distribution of T cells

Answer 5

Parafollicular area of cortex in nodes

Periarteriolar area in spleen

Question 6

Life span of B & T Cells

Answer 6

• B: short
• T: long

Question 7

Surface antibodies of B & T Cells

Answer 7

• B: present

-T: absent

Question 8

B or T cells secrete antibodies

Answer 8

B cells

Question 9

B cells form

Answer 9

Humoral/antibody-mediated immune system (AMI)

Question 10

T cells form

Answer 10

Cell-mediated immune system (CMI)

Question 11

Conc. of T cells in blood

Answer 11

80% Lymphocytes

Cd4>CD8

Question 12

B cell conc. in blood

Answer 12

20%

Question 13

Do B & T Cells move to site of infection

Answer 13

• B: no

-T: yes, lymphocytes

Question 14

Do B & T Cells have inhibitory effects on immune system

Answer 14

• B: no
• T: yes, suppressor cells

Question 15

Feline leukemia & feline immunodeficiency virus increase risk of

Answer 15

Developing lymphoma