From the SA node, the impulse travels through the AV node (atrial-ventricular node), the "gatekeeper" of impulses, to the lower chambers of the heart (ventricles) via the bundle of His, telling the ventricles it's their turn to beat. The sequence of this electrical event causes the atria...
it is not. Irregularities in the time of the first meal of the day and/or the time between the last meal of the day and first meal of the next day may also be associated with eating jet lag. College students with night-type chronotypes eat between meals, after dinner, and at bedtime...