You can start with a bent-knee plank if you canât perform a regular plank yet. If you can hold a plank for more than two minutes with ease, you can move on to these tougher variations. Practise every day. Space your planking exercise throughout the day and do 3-4 times every day.
The interaction between helper T cells and B cell. sequentially involves antigen presentation by B cells to differentiated T cells, activation of helper T cells and. expression of membrane and secreted molecules by the helper T cells that bind to and activate the B cells.
Stimulate B cells that have already become bound to antigen. T H cells interact directly with B cells that have antigen fragments on their surfaces bound to MHC II receptors T H cells stimulate B cells to divide more rapidly and begin antibody formation Cytokines released by T H amplify nonspecific defenses.