In a healthy heart, the electrical impulse that initiates contraction of the cardiac muscle originates in the:

Capnography is widely used to determine:

a. hemodynamic sta-tus. c. placement of an endotracheal tube. b. adequacy of cere-bral blood flow. d. response to bron-chodilator therapy.

What is defined as the formation of a V-shaped slit in the gingiva that extends apically from the gingival margin?

A) Recession B) Clefting C) Abfraction D) Floss cut