Microsoft Excel 2002 offers two different voices that you can use with the Text to Speech feature. This article describes how to change the Text to Speech voice.icrosoft Excel 2002 offers two different voices that you can use with the Text to Speech feature. This article describes how to change the Text to Speech voice.
The endocrine system is made up of a network of glands. These glands secrete hormones to regulate many bodily functions, including growth and metabolism. Endocrine diseases are common and usually occur when glands produce an incorrect amount of hormones.
There are two types of hormones secreted in the endocrine system: Steroidal (or lipid based) and non-steroidal, (or protein based) hormones. The endocrine system regulates its hormones through negative feedback, except in very specific cases like childbirth. Increases in hormone activity decrease the production of that hormone. The immune system and other factors contribute as control factors also, altogether maintaining constant levels of hormones.