What are some example organisms that have and use the thermoreceptor?

Thermoreceptors are free nerve endings tin the skin, liver, and skeletal muscles, and in the hypothalamus. They  code absolute and relative changes in temperature. Every organism with a nervous system can detect changes in temperature. Example is the polar bear, which can function both in a zoo during summer heat and on an ice floe in frigid Arctic waters. Also the body temperature of poikilothermic animals, such as insects, snakes, and lizards, changes in direct relation to fluctuations in the temperature of the environment.

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein