Answer to Question 1
ANS: 1
The hippocampus plays a major role in short-term memory and, hence, in learning. The other de-fects mentioned (options 2, 3, and 4) originate in other parts of the brain.
Answer to Question 2
ANS: 3
Medications used to treat psychiatric disorders operate in and around the synaptic cleft and have action at the neurotransmitter level.