Basal cell carcinoma, skin of right ear:

Looking at a full mouth series of radiographs you note that an impacted retained primary root tip can be observed between the right mandibular second premolar and the first molar in the premolar periapical radiograph

You note that the root tip appears to have "moved" mesially in the molar periapical radiograph. Which of the following is true regarding the impacted retained primary root tip? a. It is located on the buccal. b. It is located on the lingual. c. An additional radiograph would be required to determine the buccal or lingual location of the impacted retained primary root tip.

During the polarized or resting state, the inside of the cell is electrically:

A. positive. B. negative. C. neutral. D. positive and negative.