The Parliament of Jamaica is bicameral. This means that it consists of two Houses, the Senate, also called the Upper House, and the House of Representatives, also known as the Lower House. The members of the House (known as Members of Parliament or "MPs") are elected by the people of Jamaica. The leader of the political party with most members in the House of Representatives is appointed by the governor-general to be the prime minister. Senators are nominated jointly by the prime minister and the parliamentary leader of the opposition and are then appointed by the governor-general.