The visitors, who included former Reds striker Peter Crouch in their starting lineup, troubled the Liverpool defence early on and were rewarded when Simon Mignolet failed to keep out Jon Walters’ near-post header in the 12th minute.
An own goal from Giannelli Imbula and a smart finish from substitute Daniel Sturridge after the interval ensured Liverpool moved back into second place in the table, six points behind leaders Chelsea.
Henderson told Sky Sports: “Early on they put us under some pressure and we struggled to deal with the long ball, and the flick-on, in the first 15 minutes and they got the goal.
“But we adapted well towards the end of the first half, dealt with it better, and then second half we dealt with it well.
“The start wasn’t great, but, after the goal, I thought we dominated again and scored some good goals.”
But Henderson is not worried about other results, adding: “It doesn’t matter about anyone else, it just matters on what we do and we are just focussed on what we need to do.
“Every week is a different challenge for us and today was another big test that we coped with well.”