Discuss the role of endogenous pacemakers and exogenous zeitgebers in the sleep/wake cycle and one other rhythm (24) Siffre (1975) dedicated 6 months of his life to be spent isolated in an underground cave in Texas. During which‚ he was exposed to only artificial light‚ and was given no natural exogenous zeitgebers. This meant that his biological rhythms were subject to free running‚ whereby the body has to dictate its own resources and has no external aid‚ such as natural light or social norms
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Mini - assignments for biological rhythms 1. Outline what we mean by an endogenous pacemaker (3) Endogenous rhythms are rhythms that aren’t imposed by the environment but generated from within the organism. Since many of our biological cycles follow an approximation 24-hour rhythm‚ even in the absence of external stimuli‚ it follows that there must be some kind of internal biological clock. 2. What is the name given to external events that play a role in rhythmic activities? Give
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Discuss the consequences of disrupting biological rhythms Biological rhythms are controlled by endogenous pacemakers‚ which are our internal biological clocks and these rhythms are also affected by exogenous zeitgebers‚ for example light‚ food and noise. The most common disruptions of our biological rhythms occur due to aeroplane travel‚ which results in jet lag‚ and also due to shift work‚ resulting in shift lag. (AO1) Shift work described a type of job in which individuals have to be alert
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Discuss the disruption of biological rhythms 24m One example of disruption of biological rhythms is due to shift work and shift lag. This disrupts your sleeping pattern because it means you are required to be alert at night‚ so need to sleep during the day. This reverses and disrupts your circadian rhythm‚ becoming desynchronised where it is no longer entrained by EZ’s. There are many consequences of desynchronisation such as sleep deprivation. Shift workers find it hard to sleep during the day
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Every living organism has a physiological rhythm. Some animal rhythms span from about a day (circadian) and other animal rhythms span to about a year (circannual). A physiological rhythm could mean the temperature of the species‚ frequency of movement‚ brain activity‚ etc. Most animals are active during the day time and some are more active during the night (Erkert‚ 2008). For example‚ a monkey increases its muscular movement during the day making the monkey more of a daytime animal (Krilowicz and
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evaluate research into one or more biological rhythms” [research = theories and studies] There are three main biological rhythms‚ which are called infradian‚ circadian and ultradian. Ultradian rhythms occur multiple times in one day. Circadian rhythms are cycles‚ which occur once a day‚ so within the 24 hours such as the sleep-wake cycle. Infradian rhythms are less frequent once in a day such as the menstrual cycle or hibernation. The research into these rhythms offers an insight into how the body
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Walker Topic I: Bio-rhythms (separated into six essay topics) Biological rhythms: There are three types of biological rhythm; circadian‚ ultradian and infradian. Circadian rhythms are those which complete a cycle in a 24 hour period such as the sleep-wake cycle‚ heart rate or metabolism. People have variations within the circadian rhythms‚ notably the owl/lark division describing people who have biological clocks which run ahead or behind the average. Ultradian rhythms are those which occur
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consider the consequences of disrupting biological rhythms (24) A rhythm is something that is regularly repeated. All living organisms experience rhythmic changes which tend to coincide with seasonal or daily environmental changes. Most organisms have an internal biological clock called endogenous pacemakers‚ which are influences by external environmental factors called exogenous zeitgebers‚ these control periodic changes. The sleep wake cycle is a circadian rhythm that repeats itself every 24 hours
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Describe circadian rhythms (8marks) Circadian rhythms occur every 24 hours; an example of a circadian rhythm is the sleep-waking cycle. We are diurnal animals who are active during the daytime and asleep at night‚ other animals are nocturnal they are active at night but asleep during the day. The circadian rhythm depends on the interaction of physiological and psychological processes to be tuned into the sleep-waking cycle so energy is provided when needed. As diurnal humans we have a fairly stable
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Circadian rhythm sleep disorders are very disruptive to a person’s health‚ and are a common occurrence in humans. By definition‚ circadian rhythm is the cyclical 24 hour period of human biological activity where people usually sleep for eight hours and are awake for sixteen. There are two main types of circadian rhythm disorders: exogenous and endogenous. Examples of exogenous disorders include shift worker disorder and jet lag disorder. Some endogenous disorders include advanced sleep phase
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