During paradoxical sleep,
A) brain neurotransmitter activity in the pathways regulating states of consciousness is similar to that in the awake state.
B) brain oxygen consumption is lower than when awake.
C) skeletal muscle tension is dramatically increased.
D) the person is easily aroused.
E) All of the choices occur.

Question

Quizplus · Accepted Answer

During paradoxical sleep (also known as REM sleep), brain neurotransmitter activity in the pathways regulating states of consciousness is similar to that in the awake state. This is why dreams during this stage can feel very vivid and real, as the brain is highly active and processing information similarly to when we are awake. Options B, C, and D are all incorrect, as brain oxygen consumption is actually higher during paradoxical sleep, skeletal muscle tension is dramatically decreased (to the point of temporary paralysis), and the person is not easily aroused and may require significant stimuli to wake up.

During Paradoxical Sleep