Team USA & the National Team - one and the same?

Question

I recently saw a year old(?) TV ad in which the US Women's Team traveled to Brazil for a rematch. That same ad ran just to congratulate Team USA for bringing home Olympic gold. Sooo.....is it a minor issue of titles depending on the seasonal cycle (Olympics(2008) - Team USA / World Cup(2010) - National Team ), or does the team for the Olympics choose their players by way of the Olympic trials like they do for all the other team sports?

Answer 1

The national team represents the country in international matches.

It is usually the same people.

The coaches and staff may add or drop players during the build up to a big match.

They do not have try outs as some sports but new players are invited to train with the team on the chance they will become a member.