Certain smells causes us to gag because the smells triggers a response to our brains, which initiates the gag reflex. After the gag reflex is triggered, it then reacts with the other body organs and causes us to gag. It also empties our bodies during scary situations, so that we can run away faster.
quite frankly there is no smell that will make me throw up, but some smells out there have a certain toxicity that is designed to make you puke. Most of the time people have genetically pass down a weak nasal cavity causing you to puke up in the presence of odors
1 year ago
Last edited at 1:03AM on 8/22/2012
As Humans adjusted to their changing environment, the gag response developed as a PROTECTIVE mechanism. As a species we are extraordinarily sensitive to the pong of human feces (poo). Because of the illness and disease that feces can inflict, Humans developed this growing sensitivity to that odor - as a protective response. The gag response is linked into the vomiting reflex, too. So: vomiting after gagging on feces ingestion saved lives. Good response for a dreadful situation. Mothers are special (for many reasons) but they can tolerate the pong of their baby's feces because of their love. Fathers are not so well equipped, sadly. Which is why women are always the ones to clear up the mess - so men reckon, anyway....
i believe such defensive response is so useful as a warning sign to us to avoid any sort of hazards e.g) At the spring some people have allergy from pollen grain so when they come closer to a garden they begin to gag so they try to avoid this area.
i don't know how to answer this questions... but its smell from somethings and it makes us gag.... no comment no questions about this and wow its nature but i'm not sure which kind of smells makes our nose gag.