1. A VARIATION IN A BIOLOGICAL SYSTEM THAT GOES THROUGH A REGULAR CYCLE, AND MAY OR MAY NOT HAVE PSYCHOLOGICAL EFFECTS:
a) ultradian rhythms
b) biological rhythms
c) infradian rhythms
d) circadian rhythms

2. A HORMONE THAT HELPS REGULATE CIRCADIAN RHYTHMS:
a) insulin
b) serotonin
c) endorphin
d) melatonin

3. A BIOLOGICAL RHYTHM THAT HAS A PERIOD OF ABOUT TWENTY-FOUR HOURS, AND INCLUDES THE HUMAN HUMAN SLEEP CYCLE:
a) circadian rhythms
b) ultradian rhythms
c) infradian rhythms
d) biological rhythms

4. A STATE IN WHICH BIOLOGICAL RHYTHMS DO NOT MATCH UP TO EACH OTHER:
a) explicit memory
b) information processing
c) internal desynchronization
d) motor nerve

5. A BIOLOGICAL RHYTHM THAT OCCURS MORE OFTEN THAN ONCE PER DAY, AND INCLUDES THE STAGES IN THE HUMAN SLEEP CYCLE:
a) ultradian rhythms
b) circadian rhythms
c) biological rhythms
d) infradian rhythms

6. ONE OF FIVE STAGES OF SLEEP THAT A PERSON EXPERIENCES WHILE ASLEEP, AND ARE PART OF EITHER REM SLEEP OR NREM SLEEP:
a) rem sleep
b) phonetic loop
c) sleep stages
d) rehearsal

7. A BIOLOGICAL RHYTHM THAT OCCURS LESS THAN ONCE PER DAY, AND INCLUDES THE HUMAN MENSTRUAL CYCLE:
a) ultradian rhythms
b) biological rhythms
c) infradian rhythms
d) circadian rhythms

8. A PERIOD OF SLEEP IN WHICH THE EYES MOVE, THE MUSCLES LOSE TONE, AND THE SLEEPING PERSON DREAMS:
a) rem sleep
b) selective attention
c) rote rehearsal
d) sleep stages

9. RELATIVELY SLOW AND LARGE BRAINWAVES, AND GENERALLY OCCUR DURING RELAXED WAKEFULNESS:
a) delta waves
b) short-term
c) sleep stage
d) alpha waves

10. SHORT, REGULAR BRAINWAVES, AND GENERALLY OCCUR DURING PERIODS OF DEEP SLEEP:
a) ultradian rhythm
b) delta waves
c) white matter
d) alpha waves