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.
1 Helper T cells stimulate B cells to make antibodies and help killer T cells work better. 2  Killer T cells (cytotoxic T cells) destroy cancer cells and cells containing foreign substances, such as bacteria or viruses. 3  Suppressor T cells make substances that help turn off the immune system response.