1 He might end up in prison.
2 She'll almost certainly end up back on the game.
3 That's how you end up with arms like Jennifer Aniston, doing that.
4 Dr Jawanda wouldn't give the Hubbards' son antibiotics and he ended up hospitalized for his asthma.
(The Casual Vacancy, by J. K. Rowling)
What does ‘up’ mean in the above examples? Sometimes I get the impression that it has the meaning of approaching/arriving to the following state: in 1, He might end, arriving to the state of in prison. And sometimes I get the impression that it has the meaning of completely: in I, He might end, completely, in prison. What does ‘up’ mean when it combines with ‘end’?