| MadSci Network: General Biology |
Hello Secret, thanks for your question. You asked: "How does Pepto-Bismol affect the heart rate of Daphnia?"
Pepto-Bismol is a medication containing bismuth subsalicylate used for upset stomachs and diarrhea. The literature out there (Google and Pubmed searches) does not suggest that Pepto-Bismol causes any changes in heart rate, at least in people.
To find the answer to your question, though, you will need to set up an experiment:
Control Group - Daphnia in ordinary water
Experimental Group - Daphnia in ordinary water + Pepto-Bismol
Monitor their heart rates and see if the Pepto-Bismol Daphnia experience an increase or decrease as compared to the Control Daphnia.
One thing to keep in mind: Since Pepto-Bismol has a pH of around 6.0, it's possible that you may see increases in the Pepto-Bismol Daphnia heart rate simply because they're stressed by their now slightly-acidic environment.
Good luck, and keep asking questions!
Sincerely,
G. Monreal
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