The stage of sleep marked by the production of delta waves is __________ sleep.
 |
stage 1; |
 |
stage 2; |
 |
stage 3; |
 |
stage 4; |
 |
both stages 3 and 4; |
INCORRECT - Although this statement is correct, there is a better response to this question.
[Review Part 1 of the tutorial] [Review Part 2 (Matching) of the tutorial]