The parafollicular cells of the thyroid gland release the hormone called __________

All of the following are local contributing factors for periodontal diseases except one. Which one is the exception?

A) Oral piercing B) Dental calculus C) Toothbrush trauma D) Bacterial plaque

A physician specializing in image interpretation of anatomical structures within the body obtained through various imaging modalities for the diagnosis and treatment of patients is referred to as the ________________.

Fill in the blank(s) with the appropriate word(s).