histology of respiratory tract

Question 1

olfactory cells function:

Answer 1

produce stimuli of smell in bowmans gland

Question 2

olfactory region features

Answer 2

-Cillia are short and immotile, because they lack dynein arms

-Contain no goblet cells

Question 3

pharynx is lined with:

Answer 3

sratified squamous epithelium

Question 4

the vocal folds in the larynx are lined by:

Answer 4

stratified squamous epithelium

Question 5

presence of goblet cells in the larynx:

Answer 5

usually not present, but when constant irritation is casued, goblet cells are produced and cause hoarsness voice .

Question 6

trachea, main and secondary bronchi are all lined with:

Answer 6

pseudostratified cilliated type epithelium with goblet cells… until we reach tertiary bronchi

Question 7

at what level do we stop needing solid/semisolid support of cartialge?

Answer 7

at the tertiary bronchi

epithelium is the same, its just the cartialage that differs

pseudostratifed cilliated epithelium

Question 8

Transition of cartialage in:

trachea
main and secondary bronchi
tertiary bronchi
terminal bronchi

is….:

Answer 8

trachea—–C-ring cartialage
Secondary bronchi—–Complete ring
Main bronchi—–Complete ring
tertiary bronchi—–platelet
terminal bronchi—–No cartialage

Question 9

Transition of EPITHELIUM in the trachea to tertiary bronchi and terminal bronchi and respiratory

Answer 9

Trachea until the tertiary bronchi:
Ciliated pseudostratified

TERMINIAL bronchi:
Ciliated and non cilliated cuboidal

respiratory:
Alveolar 1 and 2; simple squamous

Gradual transition until completely squamous .

Question 10

Alveolar type II

Answer 10

5%
-responsible for decreasing surface tension
-Look more cuboidal compared to type I

Question 10

Alveolar type I cells:

Answer 10

95% of alveoli
elongated cells
responsible for gas exchange