Decreases as the night's sleep cycle increases

• REM
• NREM

When we are most likely to sleep walk or talk.

• REM
• NREM

When nightmares happen

• REM
• NREM

True/False: Circadian rhythms are 48 hours.

• True

• False

What technology is used to study, and better understand, sleep?

• CPAP
• MRI
• EEG
• CT Scan

Which two things happens to your body in Stage 2 (late night stage)

• Muscles tense and contract

• Heart rate slows

• Body temperature drops

• Digestion increases

Stage 3 and 4 are sometimes merged when explaining sleep. (True or False)

• True

• False

Which two are true about Stage 3 (deep sleep)?

• Slow delta waves and some faster waves

• It is the stage between light and deep sleep

• Some sleep spindles (bursts of activity)

Which one is NOT true about Stage 4 (deep sleep)?

• Hard to wake and feel disoriented if woken

• No eye movements

• Mostly slow delta waves

• Heart rate and breathing increase

Which one is NOT a function of sleep?

• Helps learning (remember new things)

• Increase proteins in brain

• Release neurotransmitters

• Maintain proteins in brain