<prompt> ACTH level is higher during:Early morningEveningAfternoonNight  <response>: Ans. a Early morningRef: Ganong, 25th edp.366ACTH and cortisol secretion is pulsatile with a characteristic circadian rhythm. It is high in the early morning and low in the evening75 of the daily production of ACTH cortisol occurs between 4:00 AM and 10:00 AM 