Governor appointments are subject to Senate confirmation.
The FRB sets monetary policy. Its seven members also serve on the other governing board of the Fed, the FOMC. However, the FRB has sole responsibility for discount rates and reserve requirements, and it is also responsible for enforcement of banking regulation.
Because governors almost never serve their full terms, there are currently only five governors on the board. The two longest-serving members, Bernanke and Vice Chair Donald Kohn, have only been there since August 2002.