TASK DEFINITION: In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.
PROBLEM:  The Met - enkephalin versus Leu - enkephalin concentration ratio was around five in each area of the brain assayed .

SOLUTION: brain

PROBLEM:  ( B ) Real - time PCR was performed on total RNA samples from the human brain regions known to express MOR1 .

SOLUTION: brain

PROBLEM:  To investigate the potential role of sympathetic nerves in preventing pronounced increases in cerebral blood flow , we evaluated the effects of abrupt hypertension on the cerebral circulation of newborn pigs with intact cerebral sympathetic innervation and after cerebral sympathetic denervation .

SOLUTION:
cerebral