Question

1.) Describe the two mechanisms in which B cells can become activated; Once activated, do they both lead to the same basic outcome?

2.)Why are type IV hypersensitivities different from the other three types.

Answer 1

Two mechanisms for B ell become activated

​​​​​​B cell is basically activated by binding of the specialized antigen to present receptor on surface area of the cell.after the binding B cells lead to divide and proliferation process.

Some stimulation of the B cell which is result into plasma cell which responsible to production of antibidies and B cell is stimulated in result of differentiation of plasma cell.

They has same output because they have humoral immunity components in adaptive immunity by releasing chemical substance called antibodies.

Question 2:

The type 4 hypersensitivity is differ from other three types because of it has a specific characteristics to cell mediated immunity response rather than three types.

It include the T cells for the development of sensitivity.