Biology Classes Over the Summer

I'm a rising senior and need to take a biology class over the summer and was wondering if anyone took biochem (301) or physiology (310) over the summer and wanted to let me know how it was. I know both won't be so fun just because of the shorter timeframe but wasn't sure if anyone would recommend one over the other. Also for context, biochem is 3 weeks, whereas physio is 6 weeks.