26) A. At many synapses in the hippocampus, long‑termpotentiation depends on the           activation of NMDA receptors which have affinitiesfor and respond to __________:            

a. GABA.

b. glutamate.

c. dopamine.

d. norepinephrine.

e. nitric oxide.

B. Based on imaging research of the brain, the region known asDLPFC (dorsolateral    prefrontalcortex) is associated with __________:

           a. verbal tasks.

           b. executive control.

           c. spatial tasks.

           d. all of the above.

           e. none of the above.   

C. Tricyclic antidepressants, and some herbal remedies such asSt. John's Wort, might share a    commonmechanism, probably involving __________:

           a. blocking the release of glutamate and GABA.

           b. preventing the Presynaptic cell from reabsorbing monoamineneurotransmitters.

           c. directly stimulating catecholamine receptors in the postsynaptic membrane.

           d. increasing the rate of synthesis of acetylcholine and ADP, andGDP. glutamate.