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The Five Senses; Your Sense of Smell

            Does age affect your sense of smell?.
            
            
            
             Smell and taste are our chemical senses. Both allow us to be aware of substances in our environment and rely on our ability to detect these substances by the chemical nature of their molecules. Our other senses allow us to be aware of the physical characteristics of our environment - its temperature, the presence of radiation (e.g. visible) and the texture of materials with which we are in contact. .
             In this chapter we will focus on the chemistry of olfaction - our sense of smell.
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             2.1 Chemoreception.
             An outline.
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             Our sense of smell is stimulated only by gaseous molecules. These may come directly from the air we breathe or may come from volatile substances, released in our mouth, from the food we are eating. .
             The molecules we perceive as smells are called odorants. Odorant molecules stimulate sensory nerve cells (neurons) at the top of the nasal cavity and these respond by sending impulses to the brain (section 1.1). The sensory nerve cells involved are called receptor cells, their surfaces have regions on them called receptor sites. These detect the odorant molecules and the process triggers a sequence of changes in the cell that eventually generate an electrical signal (figure 2.1).
             Receptors.
             Scientists believe that the receptor sites are protein molecules, embedded in the nerve cell membrane, but protruding from it towards both the inside and outside of the cell. The backbone of the protein zigzags through the membrane seven times so that one end is inside and the other outside the cell. The sections of the molecule that pass through the membrane have the a-helix secondary structure. These sections of helix come together to form a cylindrical shape. Scientists believe that the odorant binding sites lie inside this cylinder (figure 2.1).
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             Figure 2.1. Roll your cursor over the highlighted steps to follow the changes on the diagram.
             Stimulating ion flow.
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             Step 1.


Essays Related to The Five Senses; Your Sense of Smell

1. Putting In Two Senses

Putting In Two Sense(s) It is said that being different is part of life, but as with many of these "parts of life," there are two extremes on the spectrum of society: being able to hold your own and depending on society to hold your hand every step of the way. Many people may suspect that the latter group is made up of lazy, immature, and incompetent people. Though a certain percentage of these people ... has been well equipped with five senses: sight, hearing, smell, touch, and taste, most of which are vital to one's survival. If one of the essential senses were to abruptly disappear, one's ...

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2. The Importance of Reiki and Faith

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3. The Concept of God by Medieval Thinkers

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4. Chemosensation and Chemoreceptors

... the air into your nose. When your nose is clogged up, it can't smell or help you taste any food, this is why you lose appetite when you have flu or cold, for everything taste bland or plain. The senses of smell and taste, two of the five senses identified by Aristotle, are called "chemical senses" and are sometimes regarded as one sense rather than separate senses. About 80% of ... what we taste is actually due to our sense of smell ... . Without the sense of smell, we would only be able to recognize five tastes: sweet, salty, sour, bitter, ... ...

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5. Ocampo

... 't exactly sympathetic. One such individual who lost his sense of smell, Mick O"Hare, states: The loss was totally devastating. One of the first things a fellow sufferer told me was that it is the only disability where people will openly laugh in your face when you tell them. They do. But it's not amusing, it's dreadful. I found myself on the floor of the toilets at work one day just crying my eyes ... move us. With the results of the studies aforementioned proving that there is indeed a relationship between the sense of smell and state of mind, it is safe to believe that the sense of sm...

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6. Tranquility

... talk to even if they don't respond. I go to listen to the nothing noise that makes me feel at peace. My five senses take place in my tranquility. My sight, smell, hearing, the taste, and the touch of everything is perfect. It seems hard to believe there is perfect place but there is one. The sight of the church when you walk in is powerful. It will knock anyone off ... , you will smell a different aroma. The scent is like nothing you smelled before. It is sweet but strong, like a dusty unopened old cabin. The touch of hard pads which you kneel on to confess your sins on, which other befo...

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7. Sensory Deprivation

... of all of the five physical senses - hearing, smelling, sight, taste, and touch (McGuffin 2). Some people are born without certain senses or lose them later on in life through a traumatic experience, or certain diseases such as diabetes. People who have been deprived of a certain sense for example sight, notice that their other senses have grown more acute. They can hear sounds, and smell things that other people with all of their senses ... cannot. Imagine that you were deprived of all five of your senses and you were left with nothing but thought? Would you ... is derived from later ...

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8. Hoyts Cinemas And Consumer Experience

... now privately owned by Consolidated Press Holdings and has over 1500 screens worldwide. Hoyts Cinemas are an important part of Australia's entertainment industry. As of February 1999 Hoyts had 268 screens nationwide with plans to have 50 further screens added each year over the next five years (Cave 1999). In Perth, there are currently 8 major Hoyts complexes with multiple screens at each. ... national marketing manager Anthony Goldman said "Going to the movies isn't just about getting your ticket torn we want the whole precinct to make people feel, Whoa, this is the movies!' even before...

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9. Hallucinogens

... five senses work and changes our impressions of time and space. People who use these drugs a lot may have a hard time concentrating, communicating, or telling the difference between reality and illusion. Hallucinogens cause people to experience - you guessed it - hallucinations, imagined experiences that seem real. The word "hallucinate" comes from Latin words meaning, "to wander in the mind." Your brain controls all of your perceptions; the way you see, hear, smell ... , taste, and feel. Chemical messengers transmit information from nerve cell to nerve cell in the body and the brain. Yo...

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