Punctuation is there to help the reader make sense of what is written. Often it is best to change the sentence so that the meaning does not rest on a comma. 1  He went to town, but not because his father was away.
Hormone: A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland.Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.any hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.
Hormones are chemical messengers produced by the glands. They are released into the bloodstream, where they direct the activities and development of other cells. Hormones affect the appearance and growth of body fat, breasts, hair, reproductive organs and skin.