Resp Histology

Question 1

Which portion is “anatomic dead space” and why

Answer 1

conducting portion

no gas exchange, only warm/filter/humidifies

Question 2

What passes air to alveoli for gas exchange

Answer 2

respiratory portion

bronchioles, alv. ducts and sacs

Question 3

structure between pharynx and trachea? contains what?

Answer 3

larnyx
cartilage (reinforce wall), false and true vocal folds, ligament, vocalis m

Question 4

How does respiratory portion differ from conducting?

Answer 4

its cells - only contains small epithelial cells, elastic fibers, smooth muscle (only to part sacs), ciliated cells (through resp bronchioles)

conducting has large epithelium, goblet (mucus), ciliated, glands, hyaline cartilage, smooth m, elastic fibers, basal cells (mitotic stem cells)

Question 5

what does respiratory epithelium have that no where else in the body has? function of it?

Answer 5

pseudo-stratified ciliated columnar epithelium

protect airways w mucus production and transport of it out

Question 6

purpose of goblet cells?

Answer 6

synthesize mucus with mucigen granules and water

Question 7

what connects larynx and primary/main bronchi

Answer 7

trachea

four layers: mucosa, submucosa, cartilaginous, adventitia

Question 8

what type of cells does trachea epithelia have

Answer 8

psuedo-stratified columnar ciliated

goblet

Question 9

what makes submucosa different from the rest in bronchi

Answer 9

full cartilage rings -> irregular cartilage plates

Question 10

bronchioles have what type of cells

Answer 10

simple ciliated columnar and simple cuboidal
smooth m
club cells
NO CARTILAGE PLATES

Question 11

what secret lipoproteins to prevent luminal adhesion with airway collapse during expiration

Answer 11

club cells (non-ciliated)

also detox inhaled materials, antimicrobial peptide properities, used to be clara

simple cuboidal elastic fibers, smooth m

Question 12

What has simple cuboidal epi w club cells in the respiration poriton

Answer 12

resp bronchioles

Question 13

order in resp portion?

Answer 13

alveolar ducts to sacs to alveoli
alveolar rings in ducts (smooth m, collagen, elastic fibers)
simple squamus

Question 14

pneumocytes 1 vs 2?

Answer 14

t1 = squamus, line entire surface, for gas exchange, so associated w cap
t2 = cuboidal/round, secrete surfactant to decrease surface tension within alveoli (exocytosis)
precursor for t1 and t2

Question 15

what covers parietal and visceral pleura?

Answer 15

flattened mesothelium

Question 16

3 comp of blood-air barrier

Answer 16

2-3 type 1 pneumocyte lining alv.
fused basal lamina of above, endo cell of cap below
cap endo cells