E10 In the framework of studying the immune memory, some mice were injected twice by sheep
red blood cells (SRBC). In the spleen, the number of B lymphocytes is measured after each
injection. Results are shown in the document below.
Number of B lymphocytes anti-SRBC
Number of B lymphocytes anti-SRBC
900 000
700 000
500 000
300 000
100 000
-
Time
(in days)
8
Time
(in days)
0
2
4
6
30
32
34
36
38
40
42
First injection of SRBC
Second injection of SRBC
1 - Specify the nature of the immune response triggered against SRBC.
2- Indicate the mode of action of B lymphocytes against SRBC.
3- Draw a comparative table between the 1st and the 2nd injection in relation to the date of
the injection of SRBC, the time of appearance of BL anti-SRBC, the maximum number of
BL, and the duration of their presence in the body.
4. Determine the characteristics of the secondary response.​