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46 Cards in this Set
- Front
- Back
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Name the 7 conducting portions of the resp. system
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nasal cavity, nasopharynx, larynx, trachea, bronchi, bronchioles (primary), terminal bronchioles
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name the 3 respiratory portions of the resp system
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alveolar sacs, alveolar ducts, resp bronchioles
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Where is respiratory epith located?
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all conducting portions except the sup chonchae and the nasal septum
AND the nasal sinuses |
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where is olfactory epith located?
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nasal septum and sup conchae
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Olfactory epith:
Basal cells: purpose? |
nourish, divide, repair, and REPLACE sustenticular cells
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what replaces sustenticular cells?
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basal cells
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olf. epith
Sustenticular cells: purpose? |
Have microvilli and secretory granules to NOURISH AND SUPPORT and electrical insulation
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what cells of olf epith give electrical insulation, as well as nourish and support?
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SUSTENTICULAR CELLS
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Olfactory epith
Olfactory cells: purpose? |
conduction cells
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What cells of olf epith are bipolar? Describe its distal end, and basal end
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OLFACTORY CELLS -
distal end is LARGER and has cilia Basal end is the Unmyelinated axon, which passes cribiformplate to olf. bulb |
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Olf. Epith
Schwann cells? |
a glial cell that myelinates axons
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what type of cell of olf epith produces myelin?
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Schwann cell
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Olf. Epith
What are bowmans glands |
serous secretory to moisten surface
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What gives olf epith its pseudostratified appearance?
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Basal cells - nuc 2 base of pyramid shape
Sustentacular cells - nuc @ apical region |
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Describe the Lamina propria of Olf. Epith in terms of
vascular? Type of tissue? What type of gland located w/in? |
HIGHLY vascular
Collagenous CT Bowman's serous glands |
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Resp. Epith
Describe the histology of it |
Pseudostratified CILIATED columnar
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What cells of resp epith are the SENSORY cells?
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brush cells
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What type of epith lines the nasopharynx?
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resp. epith
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What is the difference between histology of portions of the pharynx?
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Naso has pseudo strat
oro and laryngyo have strat. Squa |
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Which layer of olf/resp epith plays a role in lymphatics?
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the lamina propria
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Larynx - what type of epith?
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respiratory
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What are the 2 roles of the larynx?
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airway protection and phonation
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what are the 2 cartilages of the larynx?
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hyaline and elastic
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Parts of the larynx:
Epiglottis arytenoid Cuneiform Thyroid Cricoid Corniculate what type of cartilage is each? |
Epiglottis - elastic
arytenoid - hyaline Cuneiform - elastic Thyroid - hyaline Cricoid - hyaline Corniculate - elastic |
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Trachea - layers:
Lamina propria Submucosa adventita what type of tissue is each? What are the defining characteristics of each? |
all Fibro elastic CT
1 - LP lymphatics 2 - MORE DENSE, more muc. glands 3 - has hyaline cartilage rings |
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What portion of the conducting system of respiration is defined by smooth, criscrossing muscles?
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bronchi
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Describe bronchioles in terms of
Cartilage? Glands? |
DONT HAVE EITHER
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Type of cell in terminal bronchioles?
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simple columnar
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what are CLARA CELLS? where are they?
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terminal bronchioles' secretory granules to secrete Protective proteins
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what cellular apparatus is abundant in Clara cells? why?
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RER because they secrete protective proteins
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Respiratory bronchioles have what type of epith?
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simple cuboidal
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What is the opening of an alveolar duct called?
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ATRIUM
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What is the Primary structural/functional unit of the lungs?
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ALVEOLI (alv. sacs)
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What connects 2 alveolar sacs?
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alveolar pore
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what does an alveolar pore conect? what is it within?
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2 alveolar sacs, it is part of the interalveolar septum
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What are type 1 pneumocytes primary function?
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gas exchange
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what are dust cells primary function?
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engulf foreign material
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what are type 2 pneumocytes primary fiunction?
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SECRETE SURFACTANT
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what is surfactant for? Where doe sit come from?
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reduce surface tension so lungs don't collapse? type 2 pneumocytes
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Describe the junctions of type 1 pneumocytes
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have OCCLUDING junctions - nothing gets into an alveolar sac
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What type of cells are called "septal cells"?
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type 2 pneumocytes
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What cellular organelle is abundant in septal cells?
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RER to produce proteins (surfactant production)
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What cell divides to formulate new type 1 and type 2 pneumocytes?
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type 2 pneumocytes
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what specializtion do septal cells have to secrete surfactin?
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LAMELLAR BODIES
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What 2 ways do dust cells expell material?
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up to the pharynx via ciliary action
OR thru the lymph |
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what maintains the blood-air barrier?
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a common basal lamina to the alv. epith and the underlying endoth.
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