2. All the following are true about muscles of mastication except: a. They are all superficial in position b. They are inserted into the skin c. They are all innervated by facial nerve d. They are all deep muscles c. They are dilators Sphincters

The correct answer is b. They are inserted into the skin.<br /><br />The muscles of mastication are responsible for the movement of the jaw during chewing and are not inserted into the skin. They are primarily inserted into the mandible (jawbone) and are innervated by the trigeminal nerve, not the facial nerve.