Are emotions chemical bodily functions or spiritual?

Emotions could be considered both, but mainly emotions are brain functions, and seeing how your brain uses different hormones such as serotonin, adrenaline, etc., it could be argued that emotions are specifically chemical functions. They can be spiritual, for someone who is a spiritual person. But take agnostics and atheists. They do not necessarily believe in spirituality, so would you say that their emotions are purely chemical? Possibly yes. But, mainly emotions are functions of your brains reactions to certain stimuli.