Examlex
It is impossible for sperm to be functional (able to fertilize the egg) until after ________.
REM Sleep
a phase of sleep characterized by rapid eye movements, more vivid dreams, and increased brain activity.
Sleep Spindles
Sudden bursts of oscillatory brain activity visible on an EEG that occur during stage 2 of non-REM sleep.
Alpha Waves
Brainwave patterns associated with a relaxed yet alert state, typically found in the frequency range of 8-12 Hz.
Night Terrors
Intense episodes of fear that occur during sleep, often resulting in screaming, sweating, and confusion upon awakening.
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