A biorhythm is a pattern that is physiological or psychological which _______ over a specified period of time.
repeats
1 of 16
What biorhythm happens around about every day?
circadian
2 of 16
What biorhythm occurs more than once a day?
ultradian
3 of 16
What biorhythm happens less than once a day?
infradian
4 of 16
An example of a circadian rhythm is _____.
sleep
5 of 16
An example of an ultradian rhythm is the _____ _____.
sleep cycle
6 of 16
What is an example of an infradian rhythm?
menstruation
7 of 16
Biorhythms can be governed by __________ pacemakers.
endogenous
8 of 16
Biorhythms can be regulated by _________ zeitgebers.
exogenous
9 of 16
An example of external regulation is that _____ can control the sleep cycle.
light
10 of 16
Michel ______ isolated himself in a cave for 61 days, with no exogenous stimuli. Found that circadian rhythms increased only to 24-25 hrs, supporting the existence of endogenous pacemakers.
siffre
11 of 16
Ascoff &Wever placed participants into a __2 bunker. They found that they still had a 24/25 hour circadian rhythm.
ww
12 of 16
Morgan placed the ___ of mutant hamsters in normal hamsters, they subsequently showed the mutant rhythm, supporting the existence of endogenous pacemakers.
scn
13 of 16
Folkard put a _____ in a cave for 25 days an found that her body temperature adapted to 24hrs but sleep rhythm altered to a 30hr cycle.
womamm
14 of 16
The SCN detects light and sends signals to the ______ gland which inhibits melatonin so that you feel awake.
pineal
15 of 16
When no light is detected melatonin is __________ to induce sleep by inhibiting brain mechanisms that promote wakefulness.
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