can i modify a model testing with protractor?

I have just started to test with Protractor and I would like to know if I can change a view model from Protractor.

I suppose I can not, because there is little information about it, but i need to do it or try to simulate it.

I have a ng-repeat in my app, if it has results a big panel will be displayed. The model of this ng-repeat is filled with a backend call that i want to avoid (to isolate UI tests).

Is there a way to make this work?