I wouldn't be too concerned with the medical terminology course. I mean it's nice, but assuming you are a critical reader and take an anatomy and physiology or biology course, it wouldn't be of much more benefit. Besides, medical terminology is easily enough self-taught. There are a lot of decent books out there on the subject which are all short reads.
I would recommend however the following courses in the order of priority:
1.) Anatomy and Physiology- With a background in A&P, it is much easier to rationalize a patient diagnosis, the mechanisms of a disease, drug mechanisms of action, etc. These benefits are why A&P is the core of all medical courses, no matter what field you are going into. If you learn A&P, and learn it well, you will be the best paramedic in the world.
2.) Biology- For the same reasons as above, biology gives you a background in the science of life. It covers the topics of physiology, albeit in much less depth, but you gain a better appreciation for medicine (and even A&P for that matter) as a science. Just as anatomy and physiology gives you a basis for the understanding of medicine, biology gives you the basis for the understanding of anatomy and physiology.
3.) General Chemistry- I am a strong supporter of requiring that medics learn the pure sciences. Due to my reductionist view of the world as a scientist I believe that with general chemistry, biology will make a bit more sense. Also, with an understanding of buffers, acid and base physiology will make a bit more sense when you get to it.