I think these are Form controls, but I'm not sure.

BUT now I was testing it to see if the cursor changes to a hand and I realised that I was wrong, is not that the whole cell is active to click, just a big part of it. They've made a big box (the radio button box) that is almost all of the cell's area but no all of if.

If you see the mini-video attached (pasted a youtube link), it seems I can't attached a small video) you will see that the cursor changes from the Excel cross to cursor when is hovering the radiobutton box.

So I think I will make the radiobutton boxes the bigger I can while keeping the radiobutton itself the most centered possible.

Thanks to both of you!

http://youtu.be/KOQJZJitLbM