00:01
Hello everyone, in this question we will be talking about the t helper cells.
00:05
So here option a says secrete fever producing chemicals.
00:10
Though the fever producing chemicals is basically a pyrogen that is a substance, infectious organism or their product often for cytokines that basically provoke the fever.
00:24
Then option b says that it secretes the cytokines that stimulate the clonal selection of cytotoxic t cells.
00:35
So basically the helper t cells are most important in cells adaptive immunity.
00:41
Even though they do not kill the pathogen directly, they help in activation of all types of the immune cells like cytotoxic t cells, b cells and macrophage.
00:52
And they also produce the cytokine, the tumor necrosis factor.
00:59
The tumor necrosis factor from interleukin 2 and interferon gamma which basically mediates the responses that involve the t -linked form.
01:12
Helper t2 cells produce the interleukin 4, 5, 6, 9, 10 and 13 which mediates the response involving b cells...