[Campbell Biology P.1143] According to the text, which of the following statements accurately... | Practice Question
According to the text, which of the following statements accurately distinguishes arousal from sleep?
A: Arousal is characterized by unconscious perception of external stimuli, while sleep involves conscious awareness of the external world.
B: Arousal is a state of awareness of the external world, whereas in sleep, external stimuli are received but not consciously perceived.
C: Sleep is an active state for the brain, while arousal is a passive state.
D: Both arousal and sleep involve high-frequency brain waves, but only arousal permits memory consolidation.
Explanation
The introductory paragraph clearly defines these states: 'Arousal is a state of awareness of the external world. Sleep is a state in which external stimuli are received but not consciously perceived.' This directly aligns with option B.