Pituitary and Pineal Glands
The pea-sized pituitary gland in the brain produces several hormones. One is the growth hormone that regulates how fast you grow. It also secretes endorphins, the ‘feel-good’ hormones such as seratonin. When you rub your arm or knee when you hurt it you are causing endorphins to be released in the sore area, and endorphins make us feel less pain.
The two main hormones produced by the pancreas, which lies behind the stomach and liver,are insulin and glucogen. Together these have the important job of controlling how much sugar is in the blood. Not enough insulin, or if the body can’t manage the insulin properly, can lead to a serious disease called diabetes.
What time you go to sleep and when you usually wake up in the morning is controlled by melatonin, a hormone produced by the pineal glandin the brain.