What is the name of the new field of study that reflects the shift in focus from infectious disease to psychological/behavioral factors as causes of illness and death?

A chemical found in the sacs within an axon terminal which, when released, has an effect on a nearby neuron is called a _____

a) glial cell. b) neurotransmitter. c) precursor cell. d) synapse.

Your son noticed his penis because it sometimes becomes erect and he seems to be fascinated by this phenomenon. According to Freud, in what stage is your son?

Oral Anal Phallic Fixation