Researcher Eric Kandel discovered that when he tapped a certain body spot Aplysia, a sea slug, one time, the slug would retract its gills in a defensive maneuver. However, when Kandel touched the same spot repeatedly, the slug would eventually ignore the stimulus. This change in response demonstrates _____.

A police department uses lie-detector tests in criminal investigation. While scores on the lie-detector test are fairly consistent over time, judges and lawyers in court question whether the scores provided by the police department can be used to determine guilt in criminal cases. In this case, the judges and lawyers are questioning whether lie-detector results are ____________

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

Who first described the cranial nerves and the blood supply to the brain?

a) Willis b) Harvey c) Vesalius d) Galen