PS3: sleep stages

Question 1

awakeness

Answer 1

beta waves; consciousness of surroundings

Question 2

drowsiness

Answer 2

alpha waves; eyes closed and relaxation

Question 3

stage 1

Answer 3

theta waves; eyes roll slowly and muscles begin to relax

Question 4

stage 2

Answer 4

theta waves; heart rate begins to drop, breathing rate slows, and core temperature begins to fall due to changes regulated by the hypothalamus

Question 5

K complexes and sleep spindles

Answer 5

bursts of unique electrical activity interspersed among theta waves during stage 2

Question 6

stage 3

Answer 6

slow delta waves; beginning of deep sleep, heart rate begins to fall

Question 7

stage 4

Answer 7

delta waves; body undergoes the most repair, memory consolidation, and growth hormone release

Question 8

REM sleep

Answer 8

sawtooth beta waves; occurs after stage 4, mind is alert but body is motionless. quick eye movement, vivid dreams and imagery, and high electrical activity in the brain, temporary muscle paralysis