How important is it to know yoga terminology in hindi?

I am a Kinesiology major, one of my classes involves yoga, aerobics and .. I do not remember the last part. But anyway I have a test Tuesday on the yoga segment and my professor wants us to know the hindi terms (which none of us in the class speak) yet be able to define / explain them in english. (which is a second language for some in the class) Is it really that important?