Abstract
In the catfish retina, horizontal cells that receive inputs exclusively from red-sensitive cones are the only neurons that accumulate exogenous gamma-aminobutyric acid under our experimental conditions. When isolated eyecups are perfused with bicuculline methochloride, an antagonist of postsynaptic gamma-aminobutyric acid receptors, responses of cone photoreceptors to a field of light (3 mm in diameter) become much slower and approach those to a small spot of light (0.3 mm). In addition, bicuculline methochloride decreases the frequency responses of cone horizontal cells to a field of light. These findings indicate that, in the catfish retina, feedback synapses from cone horizontal cells to cones are chemically mediated and may use gamma-aminobutyric acid as a neurotransmitter. Our results also confirm the hypothesis that, in the catfish retina, a function of the negative feedback is to improve the frequency responses of the system.
Keywords
Breast cancerMedicineDescriptive researchFamily medicineCancerGerontologyGynecologyInternal medicineSociology
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Publication Info
- Year
- 1995
- Type
- article
- Volume
- 75
- Issue
- 12
- Pages
- 6310-3
- Citations
- 0
- Access
- Closed
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Cite This
Avis Lynette Snearl
(1995).
An exploratory descriptive study of the illness attitude and knowledge of breast cancer screening among African American women: young and elderly.
Atlanta University Center Robert W. Woodruff Library (Atlanta University Center Robert W. Woodruff Library)
, 75
(12)
, 6310-3.
https://doi.org/10.1073/pnas.75.12.6310
Identifiers
- DOI
- 10.1073/pnas.75.12.6310