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.
T cells come in many types with specific functions, including: 1  Helper T cells direct the immune system. 2  In a rather lengthy process, helper T cells release cytokines. 3  Cytokines stimulate B cells to form plasma cells.