lymphocytes

Question 1

quick rundown on immunity first

Answer 1

Humoral Immunity - this involves the use of antibodies produced by the B CELLS to attack any invading foreign bodies like bacteria, viruses etc. Production of memory cells also takes place for a faster response in case of a second infection.

Cell mediated immunity- this involves the destruction of self cells damaged by mutations or infected by viruses. this form of immunity includes cells like cytotoxic T CELLS.

Question 2

which one of these are PRIMARY sites for lymphocyte production?

a) thymus
b) spleen
c) lymph nodes
d) Bursa of Fabricius
e) GI tract
f) 2 of these
g) three of these

Answer 2

f) 2 of these

Thymus and Bursa, hence their name B and T lymphocytes

Question 3

which one of these are SECONDARY sites for lymphocyte production?

a) thymus
b) spleen
c) lymph nodes
d) Bursa of Fabricius
e) GI tract
f) 2 of these
g) 3 of these

Answer 3

g) 3 of these
spleen
lymph nodes
GI tract

Question 4

which one is the most accurate match?

a) Bursa/bone marrow = maturation
b) plasma cells = T cells
c) more T cells than B cells
d) suppressor cells = B cells

Answer 4

c) more T cells than B cells

bone marrow is just development for lymphocytes
b) and d) are vice vesa

Question 5

1) T cells are more common than B cells in the blood and 2) they also mature in the nodules of lymph nodes.

a) 1 is true and 2 is false
b) 2 is true and 1 is false
c) both are true
d) both are false

Answer 5

a) 1 is true and 2 is false

Only B cells mature in nodules

Question 6

T or F

Mature B lymphocytes have a smaller nucleus and larger cytoplasm than T cells.

Answer 6

False, they’re identical

Question 7

1) T and B lymphocytes stem cells originate in the bone marrow 2) and ultimately may end up in lymphoid tissue.

a) 1 is true and 2 is false
b) 2 is true and 1 is false
c) both are true
d) both are false

Answer 7

c) both are true

Question 8

Which is false about B cells?

a) usually inactive
b) formation of stem cells to B lymphocyte happens in bone marrow
c) life span is 1 month
d) enters lymphoid organs to give rise to more identical cells
e) all are true

Answer 8

c) life span is 1 month

life span is 2-3 weeks

Question 9

which one(s) has plasmalemma-bound immunoglobulin receptors?

a) T lymphocytes
b) B lymphocytes
c) both

Answer 9

b) B lymphocytes

Question 10

a) __ lymphocytes are concerned with viral/ bacterial infections which are intracellular.
b) __ lymphocytes are concerned with foreign bodies chiilin in our system (extracellular).

Answer 10

a) T

b) B

Question 11

After an invader is marked with an antigen, what is the correct course of the cells destruction?

a) use of perforins
b) phagocytes
c) destruction of DNA
d) A and B
e) A and C

Answer 11

d) A and B

Question 12

Which is false about helper T cells?

a) otherwise known as CD4+ T cells
b) release cytokines
c) allows B cells to differentiate into plasma cells to release more antibodies when both bound to the same antigen
d) sends signal to Killer T cells to kill cell
e) all are true

Answer 12

e) all are true

Question 13

Which is false about killer T cells?

a) otherwise known as CD8+ T cells
b) releases perforins
c) releases granzymes
d) use antibodies on their surface to identify their target
e) all are correct

Answer 13

d) use antibodies on their surface to identify their target

they have plasmalemmal surface markers (clusters of differentiation, CDs)