Tobias has been having trouble performing adequately during sexual encounters.He finds himself worrying before and during sex, which seems to exacerbate his problems with performance.Which of the following psychological factors best explains Tobias's symptoms?

A) Premature ejaculation
B) Spectatorship
C) Letting go
D) Performance anxiety

Estrogen has been linked to aggressive behavior in both males and females.

Where in the brain does information about the body's levels of leptin,CCK,insulin,and ghrelin converge

A)  olfactory lobe 
B)  prefrontal cortex 
C)  cerebellum 
D)  hypothalamus