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Many radiopaque contrast media contain barium or _________.

The commonly used antiemetic used preoperatively is ________________.

Prophylactic antibiotics are prescribed to ____________.

The most common synthetic opioid used in surgery is ____________?

During an operative cholangiogram, why is saline is injected first?

Patients who eat or drink just prior to surgery are at greater risk for _________________.

Staining agents are used surgically to _______________.

___________________ any force in a story that is in conflict with the protagonist. 

___________________ that portion of a plot the reveals the final outcome of its conflicts or the solution of its mysteries. 

    Pundamilia nyererei and Pundamilia pundamilia prefer to mate with fish that look like themselves (i.e. their own species). However, when the two species encounter each other in murky water that blocks visual perception they interbreed to produce hybrids (see image above). This is an example of the __________ process.