What type of protein is a chemical messenger that travels in the blood?

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A hormone is chemical messages that help regulate biological processes. Hormones are secreted by the pituitary, parathyroid, heart, stomach, liver, and kidneys. Hormones travel through tissue fluids, such as blood. In this way, hormones are able to target and stimulate specific cells or tissues into action.

Most hormones are made...

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A hormone is chemical messages that help regulate biological processes. Hormones are secreted by the pituitary, parathyroid, heart, stomach, liver, and kidneys. Hormones travel through tissue fluids, such as blood. In this way, hormones are able to target and stimulate specific cells or tissues into action.

Most hormones are made of proteins. Insulin and human growth hormone are two examples of hormones that are composed of proteins. The function of each are briefly explained below.

  • Insulin is a hormone that is secreted by islets of Langerhans that are located in the pancreas. Insulin is the hormone that regulates the amount of glucose in the blood. In other words, insulin regulates blood sugar levels.
  • Growth hormone is secreted by the pancreas. Growth hormone stimulates growth in plants and animals.

 

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