Are emotions simply "feelings" or is there something more to them?

Emotions have cognitive, physiological, and behavioural components (Pekrun, Goetz, Frenzel, Barchfeld, & Perry, 2011). For example, supposed we're confronted by an immediate threat, such as a car running a red light as we're about to enter an intersection. FEAR is the motion we experience, but we also perceive danger (a form of cognition), our muscles tense and our heart rate accelerate (physiological reactions), and we likely slam on our breaks to avoid a collision -a behavioural response.