A majority of the board of directors constitutes a quorum for the transaction of business at any meeting of the board. If less than a majority of the directors are present at a meeting, a majority of those present may adjourn the meeting from time to time without further notice. The act of a majority of the directors present at a meeting at which a quorum is present is the act of the board of directors unless the act of a greater number is required by law or by the bylaws. A director participating in a meeting through an electronic communication medium may be considered to be present at the meeting for purposes of this chapter.