Tema 9

Question 1

1. What is CD8 a marker of?

A B-cells

B Helper T-cells

C Cytotoxic T-cells

D An activated macrophage

E A neutrophil precursor

Answer 1

C

Question 2

T-cell help for Ab production…
depends on T-cell recongnituin of…

Answer 2

Ab recognition on T-B surface

Question 3

Activation of resting B-cells by Th-cell depends directly upon costimulatory interaction between…
a. CD40 - CD40L
b. B7 and CD28
c. B7 - CTLA-4
d. ICAM-1 - LFA-1

Answer 3

A

Question 4

B-cells are distinct from T-cells…
a. are poyclonally activated by phytohemaglutinnin
b. have Ig on their surface
c. Have CD3

Answer 4

b

Question 5

TCR link to MHC-peptide is enhance by interaction betveen MHC-II on the Ag-presentig cell with… on the T-cell
a. LFA-1
b. CD4
c. CD8
d. CD2
e. CD28

Answer 5

b. CD4

Question 6

Main costimulatroy signal for activvation of resting T-cells is provided by ligation of…
a. CD28
b. Surface Ig
c. LFA-1
d. VLA-4

Answer 6

CD28

Question 7

Inyectar DSA conjugado con dinitrofenol, se comporta como…
a. Ag independiente de timo
b. Dependiente de timo
c. Hapteno
d. activador policlonal de T-cell

Answer 7

b.