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Special Senses
smell
9
Anatomy
Undergraduate 1
12/08/2012

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Cards

Term
1. Describe the olfactory organs
Definition
Provide the sense of olfaction, organs are located in the nasal cavity on either side of the nasal septum, each consists of an olfactory epithelium
Term
2. What do olfactory glands do?
Definition
Secretions absorb water and form pigmented mucus that covers the epithelium, the mucus is produced in a continuous stream that passes across the surface of the olfactory organs, preventing the buildup of potentially dangerous or overpowering stimuli and keeping the area moist and free from dust or other debris
Term
3. Olfactory receptor cells are replaced by basal cells. Why is this unusual?
Definition
look up
Term
4. Define odorant binding proteins
Definition
receptors on the surfaces of the cilia that interact with dissolved chemicals as olfactory reception occurs
Term
Define odorants
Definition
are chemicals that stimulate olfactory receptors; the binding of an odorant changes the permeability of the receptor plasma membrane, producing action potentials
Term
5. How many receptors are in our nose?
Definition
Approx. 10-20 million olfactory receptor cells are packed into an area of roughly 5 cm^2
Term
6. Define olfactory bulbs
Definition
expanded ends of the olfactory tracts; the sites where the axons of N I synapse on CNS interneurons that lie beneath the frontal lobe of the cerebrum
Term
7. How do smell sensations get into the cortex?
Definition
Through the olfactory pathway
Term
8. Define retronasal olfaction
Definition
The act of sensing odors that originate from substances in our mouth
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