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Biology in the News is presented by Dr. Lamar's Biology A/B classes. Each student is responsible for posting ONE blog entry and commenting on ONE post submitted by a fellow student.

About your initial posting . . . . . (approximately 150- 300 words)

Your initial posting is worth 30 points. It must be submitted by October 15th. - Locate an electronic article about a new finding in biology. Article must be been written in the last 12 months. Your posting should include 1) the name of the article (3 point), 2) article source - be specific (3 point), 3) date of article (2 point), 4) link to article (2 points), 5) summary of article in your own words (0-10 points), and 6) significance of article (0-10 points). Comments on significance of article can include (but not be limited to) importance of article to self, to society, or to the further advancement of a particular area of biology.

NOTE: To add link, select text in post that you want to link, click on link icon above posting field, and then paste URL information into appropriate field.

About your comments to a fellow classmate's posting . . . . (approximately 100 - 200 words)

Your comments to another student's posting is worth 20 points. Comments must be submitted between October 16 and November 19 - "The more you know, the more you realize there's a lot more to know" is certainly true to science. Read our Biology in the News blob posts. Pick one post (not your own) and submit comments about this post. Comments should included 1) A question that is raised in your mind by the post. The question should have scientific relevance (0 - 5 points) 2) a response to your question. (0-15 points) Research your question and answer it. If the answer is currently unknown, provide additional background information, describe research that is being done in this field, and/or research that is required for the question to be answered.

Tuesday, October 19, 2010

Temperature Rhythms Keep Body Clocks in Sync

Article Name: Temperature Rhythms Keep Body Clocks in Sync

Source: Sciencedaily.com (Online Magazine)

Date of Publication: October 15, 2010

Website Address: http://www.sciencedaily.com/releases/2010/10/101014144314.htm

Summary:

The article “Temperature Rhythms Keep Clocks in Sync” explains how Researchers at UT Southwestern Medical Center have found that fluctuations in internal body temperature regulate the body’s circadian rhythm, sleep and other bodily functions. The suprachiasmatic nucleus is the body’s master clock. “The SCN responds to light entering the eye, and so is sensitive to cycles of day and night. While light may be the trigger, the UT Southwestern researchers determined that the SCN transforms that information into neural signals that set the body's temperature”. The study showed that the fluctuation in temperature set the cells timing, and ultimately tissues and organs, to be active or in active. "Small changes in body temperature can send a powerful signal to the clocks in our bodies”.

Comments:

I feel that this article is very interesting. It gives a good explanation to why the human body works the way it does. It also gave good reasoning behind the research that was presented in the Article.

Tuesday, October 19, 2010-Habib Heban

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2 comments:

  1. KelliNovember 10, 2010 at 7:15 PM

    Question: If you had a night job and you had to sleep during the day, would your body still have that same natural alarm clock?

    Answer: Yes; because your body gets used to the time reduce stress of waking up at different times. You can adapt to naturally waking up at any time.



    http://news.bbc.co.uk/2/hi/health/250264

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  2. katie sadlerNovember 17, 2010 at 5:08 PM

    What effect, if any, does external temperature have on the circadian rhythm?
    According to the website, serendip (http://serendip.brynmawr.edu/exchange/node/1854), it has no effect at all. A scientist named Edery states that the circadian rhythm functions without environmental time cues (like sunlight), they can be reset, and it does not change with the external temperature changes in the environment. Whether it is hot or cold, the circadian rhythm still lasts for 24 hours. It also controls the body's temperature. At the website PubMed.gov (http://www.ncbi.nlm.nih.gov/pubmed/8092328), there was a study to determine if the body controlled it heat loss and production through the circadian rhythm. As it turns out, it still controls the heat of the body even if the body isn't allowed to sleep. The people taking part in the experiment were placed on constant bedrest and had normal fluid and food intake. They weren't allowed to sleep, but regular temperature changes were still recorded due to the circadian rhythm.

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