00:02
Hello students, the concept given in the question is about the b cell activation mechanism.
00:11
Now what is required for us is to find the incorrect statement with respect to the b cell activation mechanism.
00:21
Let us get into the explanation.
00:24
Well, you know that the lymphocytes are of two types which has involved in defense mechanism.
00:30
That's nothing but t and b cells.
00:32
Now t cells are of two types, the helper and the killer cells.
00:41
Right.
00:41
Now the helper cell helps the b cell, okay, to get activated and release the specific antibodies against the antigens what has been detected by that.
00:52
Yes.
00:53
Now, knowing this piece of information, okay, the incorrect statement is the third option.
01:01
Okay, where how will we correct this is as a secondary signal or a second signal which has been provided by an activated t cell, okay, which binds to the b cell via an antigen receptor area.
01:25
So via antigen receptor, this t cell binds to b cell as they get activated on triggered antigen, once they did a the antigen, okay? and by separate interaction also, by antigen receptor, the t cells will bind to the b cell, and also by separate interaction between the cd 40 of b cells and cd40l of activated t helper cells...