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level: Sleep cycle

Questions and Answers List

level questions: Sleep cycle

QuestionAnswer
What is stage 5 of sleep?REM, deaming. Movement inhibitation, complete prarlysis of body.
How long is a sleep cycle?90 minutes
How long does an adult need to sleep?7-8 hours
Main fuction of sleep? (most important)Needed for survival, of you dont sleep and get sleep deperivation it can kill you
One physiological effect of sleep deprivation?Affecting the nuerones, the brain wont be able to repair themselves
One psychological effect of sleep deprivation?Cognitvie functiing is imparied, person finds it hard to function at a high level.
Benefit of REM sleep?Associated with an increase in protiens, help to stimulate learning
What is a circadian rhythm?A biological cycle that lats for 24 hours
What is ultradian rhythm?A biological cycle that last for less thant 24 hours
What is infradian rhythm?A biological rhythm that last for more than 24 hours
Examples of circadian rhythm, ultradian rhythm and infradian rhthemSleep-wake cycle, sleep cycle and menstrual cycle
Waht is the suprachiasmatic nuclei? (SCN)Controls the circadiam rhythem and detects light
What is an endogenous pacemaker?A internal biological clock
What external facotrs regulate circadian rythem?Light and diet can help
What are exogenous zeitgebers?External cues that synchronise our biological rhythems
What is the sleep wake cycle made up of?5 cycles of 90 mins stages of REM and NREM, lasts abt 7.5 hours
What is melotonin?Hormone needed for sleep, darkness triggers the release from Pineal gland, levels are higher at night
What is cortisol?Horome to make you feel alert, higher in the morning but it can be released when we are stressed.
What is stage 1 of sleep?Light sleep, muscles start to relax. Last few mintues, muscles twitches, alpha and theta waves.
What is stage 2 of sleep?Sleep sindles on EGG, suddent burts of nuerol activity. NREM sleep, memory consolidation. Body temp drop, heart rate drop, ready for deep sleep
What is stage 3 of sleep?Deep sleep stage, harder to you up. Delta waves, slowest brain wave between 05 hz and 4hz.
What is stage 4 of sleep?Deepest stage, still delta waves, hard to wake up
What is stage 5 of sleep?REM, deaming. Movement inhibitation, complete prarlysis of body.
Strength of sleep-cycle explanation?Real life application, importance of melotin leads to melotonin supplements.
Strenght of sleep-cycle explanation?Supported by research from animales the SCN. Siffre supports the exogenous zeitgabers importance.
Weakness of sleep-cycle explanation?Low generaliabilty with animals like hamsters. biologically different.
Weakness of sleep-cycle explanation?Siffre done in unnatural environemnts, usedes artifical light.
What was the animal research of the SCN?ahmster removed SCN, to isolate to see cuase and effect. Hamseter random sleep-wake cycle an normal when SCN is put back in.