Respiratory 2

Question 1

begin @ bifurcation of the trachea/branch ~8-10 times

diameter decrease with branching

Answer 1

bronchi

Question 2

decrease of cartilage
decrease # of submucosal seromucous glands + goblet cells
decrease in height of ep. cells
increase smooth muscle
increase elastic fibers in L.P

Answer 2

decrease diameter

Question 3

continous with bronchi
branch approx. 6 more times to reach terminus
ep. = simple columnar/cuboidal (ciliated cells + Clara cells)
very few goblet cells, no submucosal cells
L.P. = elastic fibers

Answer 3

bronchioles

Question 4

(bronchioles) none

Answer 4

adventital cartilage

Question 5

bronchiolar tissue, interrupted by alveolar air sacs

Answer 5

respiratory bronchioles

Question 6

gas exchange; simple ep.; thin L.P. b/t alveoli = reticular CT with elastic fibers

Answer 6

alveolar proper

Question 7

(alveolar proper) simple sqaum ep. with TJ’s b/t cells

site of gas exchange

Answer 7

Type I

Question 8

(alveolar proper) cuboidal

secrete surfacant to reduce surface tension + keep alveoli open

Answer 8

Type III

Question 9

secrete surfacant

Answer 9

Lamellear bodies

Question 10

marcophages that remove particulate from alevoli

Answer 10

alveolar dust cells