|MadSci Network: General Biology|
I carried out an investigation where I placed Daphnia is different solutions of NaCL and KCl and recorded their heart rates. I found that as the concentration of potassium ions was increased and the concentration of sodium ions was decreased, the heart rate of the Daphnia decreased. I am guessing this has something to do which the wave of depolarisation which once iniated controls the heart beat. However, I am not exactly sure how this links with action potentials and sodium and potassium ions. Please could you help to explain this. I have already submitted this question but unfortunately, the search you recommended did not prove successful. I replied to the email you sent me but I was unsure if you would receive it, so I thought I would re-submit the question. I have searched your site, but there is no information on how and why potassium and sodium ions affect the heart rate of Dapnia. There is only information about the effects of temperature, drugs, etc. which is not appropriate to my investigation. I really hope you can help. Thanks, Karen Parker
Re: Why is the heart rate of Daphnia affected by the presence of ions?
Try the links in the MadSci Library for more information on General Biology.