l - 00027 - identical structures? They discovered that...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
11 Physiology of Olfactory System that Recognizes more 10,000 Different Odors Odor molecules enter the sinuses through the nostrils or the back of the throat. At the top of the sinus, receptor nerve cells bind scent compounds, neurons fire a message to brain’s olfactory bulb where signals are deciphered. American Scientist (Nov- Dec, 2004) Physiology of Olfactory System that Recognizes more than 10,000 Different Odors Mammals can detect at least 10,000 different odors. How the mammalian olfactory system can distinguish so many odorant chemicals was a longstanding mystery until 1991, when Axel and Buck made a discovery that opened a new chapter in olfactory research. They identiFed a gene family that encodes about 350, in humans. How does the olfactory system distinguish among thousands of odorants, some with nearly
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: identical structures? They discovered that odorant receptors are used combinatorially to encode odor identities. Just as letters of the alphabet can be used in different combinations to form a multitude of different words, odorant receptors are used in different combinations to create a vast array of different odor perceptions. Aroma can be even more complicated!! A characteristic aroma may be due to one chemical compound Or can be due to several chemical compounds! Aroma Classification According to Foods Group 1 : Aroma carried mainly by ONE compound Examples are aromas from: Mushroom: Banana: Vanilla Potato (cooked) Tomato Apple Butter Blue cheese...
View Full Document

Ask a homework question - tutors are online