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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

How do we distinguish different kinds of smells?

Summary Introduction

To review:

The human olfaction.

Introduction:

Chemoreceptors are receptors that are present in humans for the detection of taste (gustation) and smell (olfaction), along with measuring the levels of internal body molecules such as oxygen, carbon dioxide, and hydrogen ions. In invertebrates, the same receptors serve for the senses of smell and taste. However, the same is not the case with vertebrates.

Explanation

For terrestrial animals like us, smell involves the detection of airborne molecules. Receptors present in nasal cavities can detect odors. Humans have about 5 million olfactory receptors. Approximately 10–20 sensory hair are present on each olfactory receptor. These hairs are projected to mucus...

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