1. You don't "need" to retake Human Physiology, as it is not a prerequisite. If you do retake, regardless of how your undergrad school treats the grade, AMCAS will figure it into your application GPA the same way it would any other class. "Should" you retake it? If it's your only C among many upper-level bio classes, then it's not a huge issue, and I'd let it stand. If you have few upper-level Bio classes on your transcript, then having a C will stick out in a negative way. If you want to retake (I understand, there's an issue of personal honor here) you'd have to do so quickly in order to have the new grade on your transcript if you're planning to apply this coming cycle. But consider: What if you get another C? That would look even worse.
2. I think getting into a CA school will be a long shot with the lower GPA unless you get way higher than a 32 on your MCAT (or if there are moderating factors we are unaware of) unless you have some stand-out EC that you did not elaborate on for privacy reasons. Your brief listing doesn't tell me that. The film experience is interesting and will come up in interviews, but doesn't make your application to be a doctor stronger though it does make you diverse. California schools aren't all about numbers, though it seems that way from the stats of folks who are accepted there. They also value an amazing experience in leadership, humanitarianism, or clinical work.
