Effect of Noradrenaline on Rubidium ( <sup>86</sup> Rb) Efflux in the Rat Isolated Seminal Vesicle
Bibliographic record
Abstract
The effect of noradrenaline (NA) on the efflux of rubidium (86Rb) from the rat isolated seminal vesicle was studied in the absence and presence of phentolamine and papaverine. Strips of spirally cut seminal vesicles were incubated in radioactive 86Rb (10 microCi.ml-1) for 2 h. Radioactivity was measured using an autogamma spectrometer, and the flux data were expressed in terms of rate constants per minute, of the reactive isotope efflux. A concentration-effect curve for the effect of NA on rat seminal vesicles was constructed, alone and in the presence of phentolamine (1 mumol/l) or papaverine (5 mumol/l). The results showed that NA (10-1,000 mumol/l) produced concentration-dependent contractions in the rat seminal vesicle. These responses were greatly reduced by phentolamine but markedly enhanced by papaverine. NA significantly increased 86Rb efflux from rat seminal vesicles (control rate constant 0.0042 +/- 0.001; test 0.0064 +/- 0.002, means +/- SE; n = 8 rats; p less than 0.001). This increase (52%) occurred within an exposure of 7 +/- 1 min to NA. Phentolamine decreased the NA-induced increase in 86Rb efflux, by 75 +/- 2%, whereas papaverine enhanced it by 86 +/- 5% of the control value. The mechanism of NA-induced increase in 86Rb efflux was not further investigated but was interpreted in terms of an increase in intracellular K+ (here represented by 86Rb), which will leave the cell (efflux) after initial membrane depolarization.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".