Smell Flashcards
Olfactory cells connect to nerves in an area known as what?
Olfactory plexus
What does the olfactory bulb do?
Transmits smell information from the nose to the brain
As well as our main olfactory system we also have our?
Accessory olfactory system
What do you call it when things smell differently than they should?
Dysosmia
How many hairs of receptor cells would you find on an individual nerve cell?
6 to 8
What is the limbic system responsible for?
Memory, emotions, our basic instincts, mechanical functions
What is an odour?
Chemicals dissolved in the air that activate the olfactory system
Olfaction is a form of what type of reception?
Chemoreception
How many layers in the main olfactory bulb?
5
Where are stimuli detected in the accessory olfactory system?
The vomeronasal organ
When is a womens strongest sense of olfaction?
Ovulation
What are the layers of the main olfactory bulb from the surface to the centre?
Glomerular layer, external plexiform layer, mitral cell layer, internal plexiform layer, granule cell layer
When does the sense of smell return to normal with olfactory fatigue?
After leaving the area of high odour the sensitivty is restored with time
How does the shape theory of olfaction work?
Each receptor detects a feature of the molecule
The accessory olfactory system is thought to detect what?
Pheremones
What do yo call the study of the influence of odours on behaviour?
Aromachology
What is anosmia?
Lack of ability to smell due to a lack of functioning olfaction
What is dysosmia?
Things smelling differently than they should?
Are all odour recption genes functional?
No only portions
How many types of olfaction do we like most mammals and reptiles have?
2
What is hyperosmia?
An abnormally acute sense of smell
What do you call an abnormally acute sense of smell?
Hyperosmia
Odours are caused by what?
Chemicals dissolved in the air
How does the vibration theory of olfaction work?
Odour receptors detect the frequencies of vibrations of odour molecules
