As provided by the Constitution of Tennessee, the speaker of the senate shall in all cases be the lieutenant governor and entitled to exercise the powers and duties appertaining to that office and to enjoy and use the title “Lieutenant Governor of the State of Tennessee.” The office of lieutenant governor provided for in this chapter shall constitute a separate office from that of speaker of the senate and any person holding such office shall do so until a successor is elected and qualified, such official being hereby declared to be a civil officer subject to the Constitution of Tennessee, Article VII, § 5 as to term of office.