ISSN:
1432-0878
Keywords:
Pineal organ
;
Synaptic ribbons
;
Circadian rhythm
;
Constant light
;
Constant darkness
;
Goldfish
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Synaptic ribbons in photoreceptor cells of the goldfish pineal organ undergo significant daily changes in their length, distance from the plasma membrane, and number per unit area of pineal end-vesicle. The rhythms persist in fish exposed to constant darkness. Constant light abolishes the rhythms in length and distance of synaptic ribbons from the plasmalemma, but has little effect on numerical changes over a 24-h cycle. These findings suggest that synaptic ribbons in the pineal organ of lower vertebrates might be useful as indicators of metabolic activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00233525
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