M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:	Given the definition of the phenomenon of long-term potentiation, it may be inferred that the opposite phenomenon, long-term depression, is when:

synapses between neurons are diminished in strength for a prolonged duration.

there is a prolonged period of central nervous system depression.

depressed mood symptoms linger for a substantive period of time.

a negative feedback pathway exists aberrantly between neurons.