Could you tell me if there is any difference in meaning between it takes a lot of time and it takes up a lot of time? For example, in the 9th episode of the 10th season of Friends the latter was used. Here is the context:
Erica: I was wondering you both have such serious jobs. (to Monica) Would you have time to take care of a baby and your flock?
Monica: Oh, you know, my flock is good, I mean, yeah, my flock pretty much takes care of themselves at this point. Good flock. Flock, flock, flock.
Erica: (to Chandler) Being a doctor must take up a lot of time.
Chandler: No-ot for me it doesn’t.
I wonder if the meaning somehow would change if Erica dropped the up?