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Semester 1 Mini III Histology Respiratory System


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Air passing through the ___ is used to produce speech.
Air passing over the _____ in the nose carries stimuli for the sense of smell.
olfactory mucosa
The respiratory portion of the respiratory system consists of ____, ____, ____, and ____.
respiratory bronchioles, alveolar ducts, alveolar sacs, alveoli
The nasal cavity is divided into 3 parts, the ____, _____, and ____.
vestibule, respiratory segment, olfactory segment
The _____ of the nasal cavity is lined with _______ epithelium, continuous with the external skin of the nose.
vestibule, stratified squamous
The vestibule contains stiff hairs, called ____ that entrap large particulate matter.
Projecting from the bony lateral wall of the vestibule are three tiny bony shelves called the nasal _____ or ______.
conchae, turbinates
The _____ act as turbines to churn the air as it passes through the nasal cavity, warming, moistening and cleaning it.
nasal conchae or turbinates
The dermis of ____ contain numerous sebaceous and sweat glands whose secretions aid in entrapment of particles.
Posteriorly, where the vestibule ends, the epithelium undergoes a transition into _____ epithelium.
The ____ constitutes most of the volume of the nasal cavity.
respiratory segment
The respiratory segment is lined with _____ epithelium
ciliated, pseudostratifed columnar epithelium
Typical respiratory epithelium consists of 5 cell types, ____, ____, ____, ____ and ____.
ciliated columnar, mucous goblet cells, brush cells, basal cells, small granule cells
____ are the most abundant cell type in the respiratory epithelium and contain numerous mitochondria.
ciliated columnar
____ are the second most abundant cell type in the respiratory epthelium and secrete mucuous.
goblet cells
In the respiratory epithelium, ____ are columnar cells that have numerous microvilli on their apical surface.
brush cells
In the respiratory epithelium, ____ have afferent nerve endings on their basal surface and are considered sensory receptors.
brush cells
In the respiratory epithelium, ____ are cells thought to differentiate into other cell types.
basal cells
In the respiratory epithelium, ____ cells that secrete bombesin and serotonin.
small granule, enteroendocrine
_____ syndrome is an inherited condition where cilia lining the airways fail to function.
Kartenger's syndrome
In Kartenger's syndrome cilia fail to function due to lack of ____.
The lamina propria of respiratory mucosa contain a rich vasuclar network to _____ and contain ______ glands to assist goblet cells.
warm air, seromucous
Olfactory epithelium is a specialized ____ epithelium that covers the roof of the nasal cavity, the superior aspect of the nasal septum, and the superior concha.
pseudostratified columnar
Olfactory epithelium contains three types of cells ____, ____ and ____.
olfactory receptor cells, supporting(sustentacular cells), basal cells
Olfactory sensory neurons have modified _____ on their free surfaces containing ____ and a single axon.
immotile cillia, odorant protein receptors
Olfactory sensory neurons are supported and held in place by _____ cells and both are regenerated by _____ cells.
supporting (sustentacular cells), basal cells
Olfactory cells are ___ neurons with proximal processes that join to form the ______.
bipolar, filas olfactoria
____ cells have apical, ovoid nuclei, a narrow base, yellow- brown pigments, and provide support to olfactory cells.
supporting or sustentacular
___ glands are beneath olfactory epithelium, are serous secreting glands, and act as solvent in which odorous substances are dissolved.
bowman's gland
Each olfactory neuron can express ____ olfactory receptors.
Of the almost 1000 receptors, each recognizes a single _____ of different odiferous substances.; epitope
Of the almost 1000 receptors, each recognizes a single _____ of different odiferous substances.
Olfactory receptors are _____ receptor, whose axons synapse with dendrites of ____ cells in the glomeruli of the ______.
7 transmembrane G-linked receptors, mitral, olfactory bulb
If threshold level of impulses reaches a mitral cell in the ____ of the olfactory bulb, it becomes depolalarized and relays the signal to the ____.
glomeruli, olfactory cortex
Each glomerulus receieves input from ___ type of receptor, but the brain can recognize about 10,000 scents through ____.
one, combinations
The nasopharynx is lined by ____ epithelium, while the oral and laryngeal pharyx are lined by _____ epithelium.
respiratory, stratified squamous
During respiration the epiglottis is in the ____ position.

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