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Hormones are chemicals which circulate in the blood stream and spread around the body to carry messages or signals to different parts of the body. Show The name hormone comes from the Greek word hormao meaning "I excite" and refers to the fact that each hormone excites or stimulates a particular part of the body known as the target gland. Hormones are made in endocrine glands and passed from the cells of the gland directly into the blood flowing through the gland. Generally, the higher the amount of hormone that is in the blood, the greater the effect its the targets. Hormones produced by the pituitary glandThe two sections of the pituitary gland produce a number of different hormones which act on different target glands or cells. Anterior pituitary
Posterior pituitary
Table of pituitary hormones
Control of hormone production is monitored continuously and regulated using feedback loops. You may find the Your Hormones, Society for Endocrinology webiste, useful to find out more: http://www.yourhormones.info/ Hormones produced by the HypothalamusThe secretion of hormones from the anterior pituitary is controlled by the production of hormones by the hypothalamus. Although there are a number of different hormones they can be split into two main types:
The hormones secreted by the posterior pituitary are produced in the hypothalamus and then passed down a tube between the hypothalamus and the pituitary (the pituitary stalk) when they are then secreted into the blood. Hormones produced by other glands in the bodyIn total more than 200 hormones or hormone-like substances have been discovered. In addition to the hormones listed in the table above, five of these hormones are controlled by hormones released by the pituitary.
For more information about glands and hormones, as well as educational resources, visit the Society for Endocrinology's 'You and Your Hormones' website |