The average length of women's menstrual cycles is

Which of the following is why the skin becomes looser and why muscle mass decreases during young adulthood and beyond?

a. there is an increase in white blood cells b. there is an increase in the production of vitamin D c. there is a substantial decrease in iron d. there is a decrease in human growth hormones

In Eysenck’s model, all of the following are associated with Psychoticism EXCEPT

a. acute empathy. b. egocentricism. c. impulsivity. d. aggression.