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18 Cards in this Set
- Front
- Back
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Endogenous cycles three types
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1. circannual
2. circadian 3. circamonthly |
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Circadian
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1. blood pressure
2. sleep 3. body temp (goes up in day down at night) |
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Circannual
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Bird migration
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Circamontly
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Women's period
Body temp in females Men's testosterone (high in spring time) |
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Who is more flexible morning or evening people?
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evening because everyone runs on morning peoples schedule, so evening people can adjust better because they already have to adjust
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As age increases what to people normally fall to?
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gradual change to morning person side
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Free running circadian rhythm
how does it run if there is constant darkness or constant light |
1. constant darkness will run slower (about 25 hours instead of 24)
2. Clock runs faster ( 23 hours for example) 3. this suggests an internal clock |
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Where is the biological clock located
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superchiasmatic nucleus in hypothalamus
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bioclock where?
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Superchiasmatic nucleus in hypothalamus
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What happens if bio clock (SCN) messed up?
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cycles get damaged, still sleep about 7 to 8 hours but at all different times, not in one good chunk
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Isolated SCN neurons
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"tick" individually but do much better all together
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How do SCN neurons work?
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they all tick through action potential, individual neurons send action potentials by themselves
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How many different genes are there and name a couple that are involved with sleep cycles
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1. seven different genes with time
2. per, tim, clock, overtime |
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Zeitgeber and examples
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time giver, something that keeps time
light is example so is exercise, noise, meals, temp |
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How do proteins keep time?
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1. two interlocking proteins
2. amt of time cell takes to create protein is how it keeps time |
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Give an example of how zeitgebers can effect time
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1. affect protein synthesis
2. time gives influence period of time it takes to do the protein synthesis 3. light goes to SCN, decreases time it takes for per and tim to interlock, therefore decreases synthesis and decreases sleepiness |
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Bright light in early evening leads to?
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phase delay
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Bright light during later part of night
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phase advance
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