The effect of ventricular blood O 2, CO 2 and pH on diving bradycardia in the bullfrog ( Rana catesbeiana)
1. 1. Bullfrogs were dived for 30 min in water with O 2 saturations of 20% and 5%. 2. 2. Ventricular blood-O 2-tension was significantly higher in the group submerged in 50% saturated water. 3. 3. No significant change in ventricular blood-CO 2-tension or pH was demonstrated. 4. 4. No significant ch...
Saved in:
| Published in | Comparative biochemistry and physiology. A, Comparative physiology Vol. 56; no. 4; pp. 589 - 591 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
1977
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | 1.
1. Bullfrogs were dived for 30 min in water with O
2 saturations of 20% and 5%.
2.
2. Ventricular blood-O
2-tension was significantly higher in the group submerged in 50% saturated water.
3.
3. No significant change in ventricular blood-CO
2-tension or pH was demonstrated.
4.
4. No significant change in development, depth or release of bradycardia was demonstrated in the two groups.
5.
5. It was concluded that elevation of blood-O
2-tension in this study did not affect diving bradycardia.
6.
6. Relatively constant CO
2 and pH was attributed to anerobiasis and blood-buffering-capacity. |
|---|---|
| ISSN: | 0300-9629 |
| DOI: | 10.1016/0300-9629(77)90291-2 |