The chair of the board shall preside at all meetings and shall have the right to vote upon all questions the same as other members, and shall perform such duties in addition to those in this chapter prescribed as may be fixed by the board. The secretary of the board shall perform the duties in this chapter prescribed, and such other duties as may be fixed by the board. A majority of the board shall constitute a quorum for the transaction of business, but it shall require a majority of the entire board to authorize any action by the board.