Deep tendon reflexes were intact, with an upgoing toe on the left.

Question

which are conjunctions and prepositions?

intact = preposition
conjunction = upgoing

Answer 1

I think you're guessing. Check the posts below.

Both intact and upgoing are adjectives.

Answer 2

Look at the posted lists. Don't guess.

Please repost when you've studied those lists of prepositions and conjunctions.