1 / 9

Biorhythm Regulation

Biorhythm Regulation. Pineal Gland. Pineal Gland Function. shaped like a pine cone light absorbed by the retina is transferred and interpreted by suprachiasmatic nucleus ( SCN ) SCN passes information on to pineal gland secretes melatonin hormone

jimbo
Download Presentation

Biorhythm Regulation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biorhythm Regulation

  2. Pineal Gland

  3. Pineal Gland Function • shaped like a pine cone • light absorbed by the retina is transferred and interpreted by suprachiasmatic nucleus (SCN) • SCN passes information on to pineal gland • secretes melatonin hormone • regulates circadian rhythms – light-dependent rhythms

  4. Suprachiasmatic Nucleus

  5. Pineal Gland

  6. Melatonin • tryptophan derived hormone • melatonin production is inhibited in the presence of light • amount of light detected by SCN is proportional to the amount of melatonin produced in the evening

  7. Melatonin

  8. Melatonin & Sleep Cycles • increased melatonin increases sleepiness • can be used as a treatment for: • insomniacs • shift workers • jet lag • blind individuals • melatonin levels change with the seasons • what happens above the Arctic circle?

  9. Melatonin & Reproduction • some animals have distinct breeding seasons • melatonin inhibits GnRH • reproductive organs are inhibited • higher melatonin during shortened days • decreases breeding in the winter

More Related