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 Title    The Effect of Tetrodotoxin, Veratridine and Tetraethylammonium Chloride on the Receptor Potential o f the Crayfish Photoreceptor Cell  
 Abstract    S t i e v e a n d T . Ma l i n o w s k a In stitu t für Neurobiologie der K em forschungsanlage Jülich GmbH. The effect of three drugs on the receptor potential (ReP) o f the crayfish retina measured with external electrodes was tested. 1. Tetrodotoxin (TTX) (1 • 1CT6 g/ml and 1 • 10-5 g/ml) showed only slight effects on the receptor potential (Table I and II). 2. Veratridine (VERA) (1 • 10-5 g/ml) showed only small effects o f the same type as TT X but a little stronger on the receptor potential which became obvious especially in the period after washing out the drug (Table III). 3. Tetraethylammonium (TEA) (5 mWl) caused a decrease o f the height o f the receptor potential w ithout influencing the repolarizing phase (decrease-time tz) markedly (Table IV). The results can be interpreted as follows: 1. The permeability increase for sodium, calcium and magnesium, which causes the rising phase 
  Reference    (Z. Naturforsch. 28c, 149—156 [1973]; received December 12 1972) 
  Published    1973 
  Keywords    Receptor potential, tetrodotoxine, veratridine, TEA, photoreceptor cell, Crustacea 
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 TEI-XML for    default:Reihe_C/28/ZNC-1973-28c-0149.pdf 
 Identifier    ZNC-1973-28c-0149 
 Volume    28