Science Homework Help

Please see the link below to get the experiment information (the Lab section started at 1:37:30).

Please help me answer the question on page 28 and 19, also there is an additional question below:

Explain why K+ appears to be more critical to maintain than Na+ as per graph.

https://4cd.zoom.us/rec/play/7J0uJuCsrD83ToKdswSDB_IoW426faKs0SYbrKZYnRrkUnEGYVPwYeRHYesPg6Siaq6TjNp7X-ESSZru

Thank you so much