My Crossword Maker Logo
Powered by BrightSprout
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

BIOLOGICAL RHYTHMS

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Across
4
This French explorer spent months underground to study biological rhythms
5
A study by Miles et al (1977) showed that blind people rely on these internal cues rather than light
8
Researchers found that shift workers often get between 1-4 hours less of this
9
The approach used by Siffre to study the sleep-wake cycle
11
A type of rhythms that repeats more than once per day, such as the sleep cycle
15
The biological clock located in the hypothalamus
16
A type of work schedule that disrupts normal sleep patterns and can increase errors
17
The central pacemaker of the brain that controls circadian rhythms
20
A type of shiftwork where workers change their schedules frequently
21
A phenomenon where circadian rhythms become misaligned due to rapid travel across time zones
23
A rhythmically occurring natural phenomenon which acts as a cue in the regulation of the body's circadian rhythms
24
The natural length of the human sleep-wake cycle, according to research in the absence of external cues
Down
1
These internal biological timekeepers help regulate sleep-wake cycles
2
The gland that secretes melatonin to regulate sleep
3
The readiness to transit from wakefulness to sleep, or the ability to stay asleep if already sleeping
6
The hormone associated with sleep regulation
7
Rhythms that last longer than a day, such as the menstrual cycle
10
A hormone secretion cycle that follows a circadian rhythm
12
A biological rhythms that last one year, such as hibernation
13
The rhythmic fluctuations in physiological functions such as hormone secretion
14
The period in the early evening when sleep propensity (natural tendency) is highest
18
External cues such as light
19
Jetlag is less when travelling in this direction
22
A key external cue that synchronises circadian rhythms