Final answer:
Am Snore's EEG after being deprived of REM sleep on the first night would likely show more REM sleep than usual on the subsequent night, a compensatory phenomenon known as REM rebound.
Step-by-step explanation:
When Am Snore volunteered for a psychology experiment in which he slept for two nights in the laboratory and was deprived of REM sleep on the first night, his EEG on the subsequent night would likely show B) More REM sleep than usual. This phenomenon is known as the REM rebound, where the brain compensates for the lack of REM sleep by increasing the duration of REM sleep during the next opportunity for sleep. This aspect of sleep homeostasis indicates the regulatory mechanisms the brain employs to maintain adequate levels of various sleep stages, particularly REM sleep, which has been implicated in important functions such as learning and memory.