What action is most responsible for the resting membrane potential in cardiac muscle cells? Select one:
a. movement of K+ through voltage-gated K+ channels
b. movement of Na+ through open Na+ channels
c. movement of Ca2+ through voltage-gated Ca2+ channels.
d. closing of Na+ and K+ voltage-gated channels

Ibelieve it's choice d.

1.)dr. natterson- horowitz came to realize that their isn't much of a difference between animals and humans. just like humans, animals can suffer from illnesses and diseases like breast cancer, self injury, anxiety, and many more. she also discovered how they even treated and performed surgical procedures on animals just as if the animal it self were human. the los angeles zoo called dr. natterson- horowitz because they knew that she was a doctor and that  she would be able to recognize what was wrong with the gorilla. they knew that humans and gorillas were similar, so instead of calling another veterinarian, they called a doctor.