Question

cloze passage (student version)
directions: fill in the blanks using the word bank.
sleep is divided into several stages. in ____, we first enter light sleep where __ waves shift into __ waves, and we may feel like we are falling. in __, bursts of brain activity called __ occur, and body temperature and heart rate slow. in __, also called deep sleep, __ waves dominate, and this stage is important for physical repair and growth. finally, in __, the brain becomes very active, dreams occur, and the body enters a state of ____ to prevent us from acting out dreams.
the entire sleep cycle repeats every ______ minutes.
word bank:

• alpha
• theta
• nrem - 1
• nrem - 2
• nrem - 3
• rem sleep
• delta
• spindles
• paralysis
• 90

multiple - choice questions (student worksheet)
name: ____ date: ____
directions: circle the best answer for each question.

1. which brain waves are present during light sleep in nrem - 1?

a) delta
b) alpha → theta
c) beta
d) spindles

1. sleep spindles are characteristic of which sleep stage?

a) rem
b) nrem - 2
c) nrem - 3
d) nrem - 1

1. during which stage does physical paralysis occur?

a) nrem - 1
b) nrem - 3
c) rem
d) nrem - 2

1. which stage is most important for physical restoration and growth?

a) rem
b) nrem - 2
c) nrem - 3
d) nrem - 1

1. circadian rhythms regulate:

a) dreams only
b) 24 - hour body cycles

Explanation:

1. In NREM - 1, alpha waves shift into theta waves.
2. Sleep spindles are characteristic of NREM - 2.
3. Physical paralysis occurs during REM sleep to prevent acting out dreams.
4. NREM - 3 is important for physical repair and growth as delta waves dominate.
5. Circadian rhythms regulate 24 - hour body cycles.

Answer:

1. b) Alpha → Theta
2. b) NREM - 2
3. c) REM
4. c) NREM - 3
5. b) 24 - hour body cycles