Which of the Following Muscles Raises Each Labial Commissure of the Lips

question 25

Multiple Choice

Which of the following muscles raises each labial commissure of the lips to contribute to a patient's smile?

• A)Zygomaticus major muscle
• B)Buccinator muscle
• C)Platysma muscle
• D)Epicranius muscle

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Definitions:

Salt Domes

Geological formations created when a thick bed of evaporite minerals (primarily salt) is pushed upward by the pressure of overlying rock layers.

Less Dense

Describes materials that have a lower mass per unit volume compared to others, often leading to buoyancy in fluids.

Turbidity Currents

Underwater density currents that move swiftly downslope due to increased density from suspended sediments.

Submarine Fans

Large, underwater sediment deposits that resemble an open fan, typically found at the base of continental slopes.