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.
The main body systems involved in hormone regulation by feedback mechanisms are: 1  the nervous system. ... 2  signals input to and output from the control centre are either. 3  which are part of the. , 4  or chemical signals. 5  the endocrine system. ... 6  which produces and secretes hormones.