text: Hormones have the following effects on the body:
  * stimulation or inhibition of growth
  * wake-sleep cycle and other circadian rhythms
  * mood swings
  * induction or suppression of apoptosis (programmed cell death)
  * activation or inhibition of the immune system
  * regulation of metabolism
  * preparation of the body for mating, fighting, fleeing, and other activity
  * preparation of the body for a new phase of life, such as puberty, parenting, and menopause
  * control of the reproductive cycle
  * hunger cravings
  A hormone may also regulate the production and release of other hormones. Hormone signals control the internal environment of the body through homeostasis.