When a trauma case arrives in the emergency room of Grey Sloan Memorial, the doctors on Grey's Anatomy spit out rapid-fire medical diagnoses like it's second nature. But how well do the actors know the complicated medical terms when they haven't been practicing them from a script?

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During a recent set visit, we quizzed stars Kevin McKidd, Camilla Luddington, Justin Chambers, Caterina Scorsone and Jessica Capshaw to see how quickly they can recite tongue-twisting medical jargon - which also happens to be actual dialogue from the show.

Check out the video above to see which cast members are ready for medical school and which ones provide prime blooper reel material. (You might be surprised to find out which actor had the most difficult time with the challenge!)

Grey's Anatomy airs Thursdays at 8/7c on ABC.