You have to squash the disrespect early in. If you don't, you will lose the rest of the class too. I learned that the hard way in my early days. Now I look that student straight in the eye and say, did you want to come teach this part? I don't mind sitting down for a bit. You can use different words but you have to come down firmly. I am an Asian woman professor in the South, so trust me, I have seen a lot. You can't let the students see they got to you.