Which of the following are true of neurons within the ventrolateral preoptic area (vlPOA)?
a. Damage to vlPOA neurons produces sleepiness.
b. Excitotoxic lesions of the vlPOA increase sleep in cats.
c. vlPOA neurons have a low firing rate during sleep.
d. Electrical stimulation of vlPOA neurons produces signs of drowsiness.
e. vlPOA neurons secrete glutamate to excite regions that control arousal.
Answer: d. Electrical stimulation of vlPOA neurons produces signs of drowsiness.
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