The circle of Willis provides communication between the internal carotid, external carotid, and vertebrobasilar systems.

All of the following statements concerning dissociation constant (pKa) are correct except one. Which statement is INCORRECT?

Nerve fiber type _____, the smallest and the most numerous nerve fiber, is responsible for what type of pain?

Which anesthetic drug has the shortest half-life and is a good choice when additional anesthesia is needed later in an appointment?

Choose the 2 correct words to fill in the blank. If more anesthetic is needed for a procedure, it is important to reinject the anesthetic before the ____________ fibers have fully recovered. Partially recovered fibers can achieve rapid onset of action with a second dose at a _____________ volume than initially administered.

The number of 1:100,000 epinephrine-anesthesia cartridges that a patient with cardiovascular disease may have per dental appointment is 

Pain threshold is best described as which of the following?

The nurse is reviewing a client’s medication record and notes that the client is taking a HMG-CoA reductase inhibitor (statin) and amiodarone (Pacerone). For which potential drug-drug interaction will the nurse carefully monitor?

Choose the 2 correct words to fill in the blanks.    Local anesthetic cartridges containing vasoconstrictor contain the preservative ____________, which may cause __________ reactions especially in steroid dependent asthmatics.

A 45-year-old client is scheduled to have a STAT computed tomography (CT) scan of the head and neck with and without contrast to assess a recently sustained head injury. The radiology nurse has reviewed the current MAR. Which of the following drugs listed on the MAR would contraindicate the client from having the CT scan performed now?