In What Sense Could a Fall in Leptin Levels Be

Multiple Choice

In what sense could a fall in leptin levels be considered as a hunger signal?

A) Reduced leptin levels remove an inhibitory influence on NPY/AGRP neurons.
B) Leptin normally excites NPY/AGRP neurons.
C) Reduced leptin levels remove an inhibitory influence on CART/alpha-MSH neurons.
D) Leptin normally inhibits CART/alpha-MSH neurons.
E) Leptin increases the production of ghrelin.