Enkaphalin is a

If a resultant panoramic image shows a reversed smile (frown), the likely cause is that

A) the patient's chin was too low. B) the patient's chin was too high. C) the patient was slumped over. D) the patient's head was tilted.

Which one of the following statements is true?

A) The perinatal period is from three days predelivery until 10 days after delivery. B) The perinatal period is from the time surrounding the birth of a child until 20 days after birth. C) The perinatal period is from the time surrounding the birth of a child until 28 days after birth. D) The perinatal period is from the time surrounding the birth of a child until eight weeks after birth.