Instead we bring in a space heater or we light a fire in the fireplace. The thermostat sensing the temperature to be at 65-70 will not signal the furnace to continue sending up heat and eventually all the heat in the room will be produced by the space heater or the fireplace. The rest of the house may become cold and the pipes freeze up, especially if there is only one thermostat in the house and it is located in the living room. In our body some glands, if turned off for a period of time because of externally supplied hormones, will begin to atrophy. If they are turned off for a long enough time it may be very difficult to get them going again once the externally supplied hormones are no longer supplied.
Peptide hormones are simply special proteins with bioregulatory functions.
Amine hormones are similar except they are all made from the amino acid tyrosine. They are packaged, delivered, and work in the same way as peptide hormones. Steroid hormones are not based on proteins but on cholesterol. Protein Synthesis Protein synthesis is another process of central concern for all athletes. Proteins, especially muscle proteins like actin and myosin, depend on steroid hormones.