4. checkmate. when the minimal amount of urinals are used in a boys bathroom, but you cannot use one without breaking guy code. 5 urinals, people at urinals 2 and 4, so you cannot use a urinal without being next to someone.
1 When blood concentrations of thyroid hormones increase above a certain threshold, TRH-secreting neurons in the hypothalamus are inhibited and stop secreting TRH. 2  This is an example of negative feedback.
Hormones are a kind of biochemical messengers. Most hormones are chemical substances produced by specialized tissue formations called endocrine glands. The substances are secreted directly into the bloodstream, other body fluids, or into adjacent tissues.The purpose of hormones is to regulate metabolic activity of some other organs or tissues of the body.Three different ways hormones act: 1. Alter the rate of synthesis of your cellular protein. 2. Change the rate of enzyme activity. 3. Change the rate of transport of nutrients through the cell wall.he purpose of hormones is to regulate metabolic activity of some other organs or tissues of the body. Three different ways hormones act: 1. Alter the rate of synthesis of your cellular protein. 2.