Jenna walks into her science class laboratory, and she immediately feels queasy. today is the day her class is dissecting frogs and she is sickened by the smell of the formaldehyde. however, after an hour jenna is no longer sickened because of

Could be something like habituation or sensory adaptation. This is where a person eventually becomes accustomed to a smell, taste, etc over time as they're exposed to it. This is the result of how the body adjusts itself to varying circumstances within the environment and is related to the larger process of homeostasis.