How many stages are there in the general adaptation syndrome?

What mood disorder is characterized by alterations between periods of extremely high levels and extremely low levels of activity?

A) Bipolar disorder B) Major depressive disorder C) A manic episode D) Seasonal affective disorder

Megan just turned 32. She is keenly aware of biological changes that occur as she gets older. What's more, she measures the sensitivity of her senses and other physical characteristics by using sophisticated testing equipment

In which of the following areas is she likely to find some decline? a) vision and hearing b) sensitivity to odors and temperatures c) sensitivity to taste, muscular strength, and hearing d) sensitivity to taste, vision, and muscular strength