Flashcards
Pineal Gland
Cards in this deck (11)
- 1Pineal Gland: a peanut in the brain
- 2The pineal gland is involved in different functions in vertebrates, but looking at the mammals' function, it is involved in ... .(sending signals related to light)
- 3There is a special hormone produced in darkness which is called ... . When light hits the photoreceptors in the retina, a signal is triggered to the ... from there to the ... and then to the pineal gland; where this hormone is inhibited in a proportional way depending on the ... .(melatonin; suprachiasmatic nucleus (SCN); superior cervical ganglia (SCG); brightness of the light)
- 4Scheme about melatonin production
- 5The production of melatonin is initiated by a nightlife enzyme called ... which hunts ... to produce N-acetyl serotonin, and followed by ... which produces the hormone.(aralkylamine N-acetyltransferase (AANAT); serotonin; O-methyltransferase)
- 6Which functions are carried by our friend melatonin?- Circadian rhythms maintenance
- Reproductive function
- Involved in life and behaviors
- Colour changes - 7Okay, you know now all its functions but... How are the colour changes produced?Melatonin inhibits MSH in low light conditions and that implies a whitening in skin colour.
- 8More things about MSH: In fish and amphibians, MSH from the pars intermedia makes ... their skin, often in response to background changes. Its size is usually related to ... and ... , increasing with the former and decreasing with the later.(darker; ability of colour changing; environmental humidity)
- 9Can you imagine which advantages would the colour changes provide to animals?- Camouflage (cryptic coloration)
- As a warning sign (aposemantic coloration)
- Communication (sexual courtship or mood)
- Radiation protection and thermoregulation (different absorbance of light)
- 10The magical cells related to colour changes are ... and ... , changing the distribution of pigments in ... and ... .(chromatophores; melanophores; dermis; epidermis)
- 11MSH has other functions in humans. Do you remember them?- Protection of the foetus
- Behaviour (excitement, motivation, attention and memory)
- Neuroplasticity
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- User has deleted their subject information Flashcards on Pineal Gland, created by Deleted user on 07/01/2021.
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- Deleted user · Jan 2021
- Updated
- Jan 7, 2021
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- Created by Valentín Ángel Limón · Dec 20, 2020
- Copied by Valentín Ángel Limón · Jan 7, 2021
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