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Nasal-smelling

Nasal smelling is normal smelling through the nose. The active substances producing the smell pass through the nostrils on their way to the olfactory epithelium in the roof of the nasal cavity and from there through the nasopharynx to the oral / pulmonary cavity from where they are then exhaled. The process corresponds to breathing with the mouth closed. [Pg.576]

Odor and Odorant. That which is smelled. Odor may refer to the odorant or to the sensation resulting from the stimulation of olfactory receptors in the nasal cavity by gaseous material. [Pg.19]

There are certain weU-estabUshed facts about olfaction (6). AU normal people can smell. People suffering from brain lesions, injured olfactory nerve, or obstmcted nasal passages may be anosmic. Cases of preferential anosmia, ie, abUity to sense certain smells and not others, are not weU estabUshed. Such cases occur, but Utde is known of them. [Pg.292]

The epithelium covering the nasal cavity. This epithelium contains numerous cell types including the specialized olfactory sensory neurons which detect the chemical stimuli derived from smells by a specific family of G protein-coupled receptors known as olfactory receptors. [Pg.901]

Ritchie (1944) wrote The Organ of Jacobson consists of paired tubular bodies, vascular and richly innervated, lying enclosed in bone in the front of the nasal chamber, and communicating with the nostrils above, and on the other hand with the mouth by two naso-palatine canals which open behind the posterior incisors. It occurs from Amphibia onwards and is probably an accessory organ of smell". [Pg.13]

Adults Nasal congestion or obstruction, nasal/postnasal discharge or purulence, facial pain or pressure (especially unilateral in a sinus area), diminished sense of smell, fever, cough, maxillary dental pain, fatigue, ear fullness or pain... [Pg.1068]

I ve found that if I bring in coffee beans, put them in a little cup, and snort it, I can clear my sinuses and nasal passages. I also carry lavender with me because lavender clears the air. If there s a smell that s hard for me, I smell the coffee beans or put a little lavender on my temples to try to change the air. And I tell people that we have a fragrance-free policy. [Pg.175]

In humans and other mammals, the sense of smell begins when we inhale some odorant through our nose. The inhaled air enters the nasal cavity where it encounters a large number of olfactory neurons located in the nasal epithelium associated with bony structures located at the rear of this cavity. These bony structures are known as turbinates. In a human, these turbinates create a surface area of a few square inches. In a medium-size dog, in contrast, the turbinates have a surface area several times larger. It is small wonder that dogs have a more acute sense of smell than we do. [Pg.354]

The major constituent of caraway oil is (+)-carvone, and the typical caraway odour is mainly due to this component. On the other hand, the typical minty smell of spearmint oil is due to its major component, (—)-carvone. These enantiomers are unusual in having quite different smells, i.e. they interact with nasal receptors quite differently. The two enantiomeric forms are shown here in their half-chair conformations. [Pg.78]

Pneumoconiosis has been reported among workers exposed to nickel dust, but exposure to known fibrogenic substances could not be excluded. Nasal irritation, damage to the nasal mucosa, perforation of the nasal septum, and loss of smell have only occasionally been reported in workers exposed to nickel aerosols and other contaminants. ... [Pg.509]

Selenium dusts produce respiratory tract irritation manifested by nasal discharge, loss of smell, epistaxis, and cough. A group of workers briefly exposed to unmeasured but high concentrations of selenium fume developed severe irritation of the eyes, nose, and throat, followed by headaches. Transient dyspnea occurred in one case. Workers exposed to an undetermined concentration of selenium oxide developed bronchospasm and dyspnea followed within 12 hours by metal fume fever (chills, fever, headache) and bronchitis, leading to pneumonitis in a few cases all were asymptomatic within a week. ... [Pg.623]

As Xi Xin enters the Lung meridian and has an aromatic smell, it is often used for transforming cold and thin phlegm from the Lung, opening the nasal orifices and improving the sense of smell. [Pg.42]

Blocked nose and loss of sense of smell add Xin Yi Magnoliae flos), Bo He (Menthae herba) and Bai Zhi (Angelicae dahuricae radix) to open the nasal orifices. [Pg.51]

Why is that Why is chocolate the most frequently mentioned food in surveys about cravings (Actually, this is mostly true for young women men crave pizza.) While some scientists have argued that the cause Is certain compounds, such as anandamide or caffeine, which do have the potential for pharmacological activity, the consensus is that chocolate is addictive because of its flavor. Not its taste, however. Flavor is more than just taste smell and texture also come into play. Flavor chemist Dr. Sara Kisch proved this very effectively at the chocolate symposium. She handed out jelly beans of various flavors and asked us to sample them while holding our noses. They were indistinguishable. But identification was no problem once our nostrils were liberated. It was a dramatic demonstration of the role smells play in flavor detection. When the nose is pinched, no air can flow from the mouth to the nasal passage, where our... [Pg.113]

Besides texture and color, flavor (taste and smell) is an important property of foodstuffs. Smell is caused by volatile compounds coming into contact with a distinct area in the nose, the so-called "regio olfactoria" [1], Volatile flavor compounds are denoted odorants or odor compounds, if they have been perceived nasally (before eating) and aroma compounds if they have been perceived retronasally via the throat (during eating). Therefore, in the literature the terms flavor, odor or aroma compounds are often synonymously used. [Pg.403]

An incidental bit of trivia — yet another bit of evidence that we are all totally asymmetric in our personal body chemistry. R and S secondary butanols smell different. The R has a subtle smell, which is rather fragrant. The S is stronger, hits the nasal passages harder, and reminds one of isopropanol more than does the S isomer. [Pg.69]

In humans the olfactory receptor cells lie in the mucous membrane at the top of the air passages on either side of the nasal septum. They occupy a total area of about 2 cm, which is small compared with most other mammals. Evidence from both anatomy and embryology shows that the development of the olfactory tissue is closely linked to that of the pituitary gland which lies at the base of the brain. Among other functions the pituitary plays a key role in the coordination of sexual activity and reproduction. This ancient association between the sense of smell and the reproductive process is one that has important implications for work of the perfumer. [Pg.71]

This link between the sense of smell and reproductive activity not only goes back to the most primitive organisms but is also deeply embedded in the unconscious mind of all higher animals including humans. Research into human biology has shown that if the neural link between the nasal receptor cells and the pituitary is broken, sexual interest and function may be greatly impaired. [Pg.72]

One of the lesser functions of the nose in man is that of olfaction. The olfactory region of the nose, a small patch of tissue containing the smell receptors, is located towards the roof of the nasal cavity and is lined with non-ciliated neuro-epithelium. Approximately 20% of the air flowing through the nasal cavity is directed upwards to the olfactory region. Here, bipolar neurones react to inspired air and initiate impulses in the olfactory nerves. [Pg.217]

The mechanism of olfaction has many theories but is not fully understood and is still the subject of research. The nose is the human organ that detects smell (Fig. 5.9). It extends from the face to the end of the palate. In its simplest explanation the two nasal cavities are lined with a mucous membrane, kept moist by the secreted substance mucus. Chemicals in the air entering the nose must dissolve in this mucus before they can be detected. A small area - about the size of a small postage stamp - in the upper part of the nasal cavity contains olfactory cells, which are sensitive to the chemicals in the mucus solution. For a molecule to be detected it must bind specifically to the sensitive cells that act as sensory receptors. The sensory receptors situated in the olfactory epithelium (epithelium is the name given to the outer layer of covering cells) are believed to bind specifically with substances according to the shape of their molecules. [Pg.109]

Figure 5.9 The human olfactory system. (A) Section through the nose. (B) Section through the cribriform plate. (C) The olfactory pathway to the cerebrum (forebrain). This shows the pathway of olfactory sensation. Nasal stimulation begins at the cilia of the olfactory receptor cells located at the ends of the olfactory nerves. The olfactory nerves then carry the impulse to the cerebrum, resulting in the sense of smell. Figure 5.9 The human olfactory system. (A) Section through the nose. (B) Section through the cribriform plate. (C) The olfactory pathway to the cerebrum (forebrain). This shows the pathway of olfactory sensation. Nasal stimulation begins at the cilia of the olfactory receptor cells located at the ends of the olfactory nerves. The olfactory nerves then carry the impulse to the cerebrum, resulting in the sense of smell.
If the areas of the brain that recognize and translate information about an odour are damaged or destroyed that person will experience impaired smell even when the nasal receptors are functioning normally. [Pg.112]


See other pages where Nasal-smelling is mentioned: [Pg.576]    [Pg.576]    [Pg.203]    [Pg.221]    [Pg.399]    [Pg.14]    [Pg.277]    [Pg.26]    [Pg.97]    [Pg.244]    [Pg.162]    [Pg.41]    [Pg.74]    [Pg.77]    [Pg.87]    [Pg.138]    [Pg.755]    [Pg.1335]    [Pg.33]    [Pg.537]    [Pg.416]    [Pg.336]    [Pg.119]    [Pg.775]    [Pg.41]    [Pg.68]    [Pg.55]    [Pg.9]   
See also in sourсe #XX -- [ Pg.576 ]




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