> As elements interact with each other microkernels? And what happens when the 
> processes are executed in the kernel (as the interaction occurs at the level 
> of teams)


Sorry, I am not really getting your point.
Processes are not executed in the kernel.

Please check this page to get more insight:
http://community.qnx.com/sf/wiki/do/viewPage/projects.core_os/wiki/KernelSystemCall

Hope this helps,
-Jeevan