A question regarding the refresh of dependent dataflows

Dear All,

I'm currently working on an application using various dataflows, below is an example of a dataflow B using as a datasource another dataflow (A) and a different datasource (A2).

When the dataflow A is refreshed, the refresh of (B) is triggered automatically. In this case, does the second refresh affect the part related to (A) exclusively (a_1 and a_2) or does it include all the other queries (so a_1, a_2, a2_1 and a2_2) ?

Thanks in advance