If you feel your heart rate decreasing just by looking at these photos of Marine Science students with their faces immersed in icy cold water, then maybe you too would exhibit a mammalian diving reflex. Or perhaps you would actually need to feel the cold water on your temples to cause bradycardia. Why not try it?!
Once again this year, there were many willing participants in a short experiment we did in class today and many who did show a significant decrease in heart rate (bradycardia), one aspect of the mammalian diving reflex.
Pearson College Marine Science 