Final answer:
In the closed bite registration technique, the patient closes their teeth together before the impression material is placed for accurate measurement. The masseter muscle is responsible for the action of chewing, which involves the movement of the jaw to grind food.
Step-by-step explanation:
In the closed bite registration technique, the patient is instructed to close their teeth together before the impression material is placed. This method allows for an accurate recording of the patient's bite and how the teeth come together when the mouth is closed. Conversely, with an open bite registration, the teeth would be apart, and the material would be placed while the mouth is open, but this does not apply to the question's situation.
Regarding the mini activity mentioning types of teeth, this is a simple exercise to help individuals understand the different kinds of teeth present in the human mouth, such as the incisors, canines, bicuspids, and molars. These teeth have different shapes and functions in the process of cutting, tearing, and grinding food.
For question 14, the answer would be 'b. chewing'. The masseter is a muscle in the jaw that is primarily responsible for the action of chewing food. It is one of the muscles that facilitate the movement of the jaw so that the teeth can grind and break down food into smaller, digestible pieces.