Unconditioned stimulus

{
  "id": "MLC-T-CHM-012419",
  "term": "Unconditioned stimulus",
  "field": "Chemistry",
  "definition": "A stimulus that naturally and automatically triggers a reflexive or innate response without any prior learning or conditioning. This type of stimulus elicits an unconditioned response, which is an unlearned reaction. For example, the smell of food is an unconditioned stimulus that naturally elicits salivation.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "stimulus",
    "conditioned stimulus"
  ],
  "references": [
    "PAC, 2015, 87, 841. 'IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)' on page 907 (https://doi.org/10.1515/pac-2015-0103)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/unconditioned-stimulus/"
}