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1:Inexperiments,humanvolunteersspentseveralweeksundergroundinconstantlight.2:Atfirst,...
1: In experiments, human volunteers spent several weeks underground in constant light. 2: At first,their natural clock and sleep patterns were disrupted. 3: After a few weeks, they reverted back to thenatural circadian rhythm with a 24-hour clock more or less in line with the outside world. 4: Our natural clocks are helped to adjust by exposure to sunlight and do respond to patterns of light and dark.
5: Our bodies remain more responsive to biological rhythms than to the demands of clock time or the distractions of the outside world.
6: Since the mapping of human genes as part of the genome project, we have a greater understanding of circadian rhythms and their role in genetic conditions. 7: Some families have genetic conditions which make them less sensitive to circadian rhythms. 8: This may help explain patterns of sleep disturbances found in those families. 9: Our work patterns, leisure patterns, architecture, lighting, food, drugs and
medication compete with our natural clocks. 10: These biological rhythms are known as circadian rhythms and we know they are particularly strong in birds.
11: In humans they are particularly controlled by the suprachiasmatic nucleus (SCN) in the anterior hypothalamus at the base of our brains. 12: If this part of the brain is damaged, a person loses all sense of a natural 24-hour clock, where sleep coincides with nighttime. 13: In other people, circadian rhythms are much stronger than was expected. 14: Astronauts, who lose this connection to the sun's
rhythms for a long time, find it hard to adjust. 15: Many require medication to help them sleep.
16: Night-workers, even after 20 years on shift patterns, do not adjust circadian rhythms to suit the demands of night working. 17: Certain illnesses such as peptic ulcers and heart disease, as well as increased risk of car crashes, are much more common to night- shift workers. 18: As the long-term effects of disrupting circadian rhythms are yet to be discovered, we should take care to ensure the health of shift-workers and those with genetic conditions that make them less sensitive to the biological
24-hour clock. 19: It may be that conditions associated with mental ill-health, such as schizophrenia and bi-polar disorders, are also linked to malfunctions in circadian rhythms。请将此19句话排好序，中间加上适当的连接词！
老师给的文章 条理不清不楚 哎 ！感谢大家这么热心哈 分还是不能浪费了 展开
5: Our bodies remain more responsive to biological rhythms than to the demands of clock time or the distractions of the outside world.
6: Since the mapping of human genes as part of the genome project, we have a greater understanding of circadian rhythms and their role in genetic conditions. 7: Some families have genetic conditions which make them less sensitive to circadian rhythms. 8: This may help explain patterns of sleep disturbances found in those families. 9: Our work patterns, leisure patterns, architecture, lighting, food, drugs and
medication compete with our natural clocks. 10: These biological rhythms are known as circadian rhythms and we know they are particularly strong in birds.
11: In humans they are particularly controlled by the suprachiasmatic nucleus (SCN) in the anterior hypothalamus at the base of our brains. 12: If this part of the brain is damaged, a person loses all sense of a natural 24-hour clock, where sleep coincides with nighttime. 13: In other people, circadian rhythms are much stronger than was expected. 14: Astronauts, who lose this connection to the sun's
rhythms for a long time, find it hard to adjust. 15: Many require medication to help them sleep.
16: Night-workers, even after 20 years on shift patterns, do not adjust circadian rhythms to suit the demands of night working. 17: Certain illnesses such as peptic ulcers and heart disease, as well as increased risk of car crashes, are much more common to night- shift workers. 18: As the long-term effects of disrupting circadian rhythms are yet to be discovered, we should take care to ensure the health of shift-workers and those with genetic conditions that make them less sensitive to the biological
24-hour clock. 19: It may be that conditions associated with mental ill-health, such as schizophrenia and bi-polar disorders, are also linked to malfunctions in circadian rhythms。请将此19句话排好序，中间加上适当的连接词！
老师给的文章 条理不清不楚 哎 ！感谢大家这么热心哈 分还是不能浪费了 展开
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