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Not only does the suprachiasmatic nucleus (SCN) play an important role in the circadian regulation of endocrine systems, but the hormones being regulated by this neural nucleus have been shown to, in turn, provide feedback to the SCN and regulate its activity. Studies indicate that the steroid hormones estradiol and testosterone each influence SCN activity. In your answer, describe the regulatory effect(s) that each of these hormones exerts on the SCN. Also, as part of your answer, compare and contrast the efficacy that each hormone possesses when regulating SCN activity.
I'm trying to understand if the timing of human bowel movementsin the morning is associated with the circadian rhythm, and canthus be used to make predictions about the circadian rhythm.
What influences the timing of bowel movements? Is it the timingof meals, caffeine intake or is it a biologically programmedtime?
I'm reading this article onblood sugar and circadian rhythms andthe following question popped into my head: a lot of articlesmention various diurnal or circadian rhythmicity of biologicalprocesses. Is there a "master" list of hormones, gene expressionsand other processes that the modern science recognizes as"circadian"?
In other words, is there something that can give reader a clearpicture of what's happening at a certain (biological)time for ahuman and is expected to happen tomorrow at similar time?
It would be great to take a look at such list and see what arethe major processes that recur on a time-sensitive basis inhumans.
