If you hit your head during a football game,your brain fortunately provides some protection in the form of a fluid that creates a cushioning effect upon impact.Which fluid,produced by the glial cells,provides this cushioning effect

A)  blood-brain barrier 
B)  endorphins 
C)  cerebral spinal fluid 
D)  neurotransmitters

If someone is not suffering from depression but gets diagnosed with depression anyway,the clinician who made the diagnosis made a ______ judgment.

A) false negative
B) true negative
C) false positive
D) true positive

Jealousy always signals difficulty between partners, and it threatens the relationship.