Respiratory Histology Flashcards Preview

CRRAB II--Wk 6 > Respiratory Histology > Flashcards

Flashcards in Respiratory Histology Deck (37)
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1
Q

Most respiratory tract epithelium

A

pseudostratified ciliated columnar epithelium

2
Q

Sustentacular cells

A

columnar cells

physical support and nourishment

3
Q

Epithelium in

nasopharynx

oropharynx

layngeal pharynx

A

naso: respitatory
oro: stratified squamous
laryngeal: stratified squamous

4
Q

Hyaline cartilages

A

thyroid

cricoid

tracheal rings

5
Q

Elastic cartilages

A

epiglottis

6
Q

Epiglottis epithelial covering

A

superior: stratified squamous
inferior: pseudostratified ciliated columnar

7
Q

Trachea mucosa

distringuishing feature

A

very thick basement membrane

8
Q

Ciliated columnar cells

functions

A

move mucus

9
Q

Cross sectional area at each branch point…

A

increases

10
Q

Basal cells

function

A

divide to replenish goblet, ciliated columnar

11
Q

IgE receptors found on

A

mast cells

basophils

12
Q

Basal cells

A

pyramidal cells

replace sustentacular cells and olfactory cells

13
Q

Bronchus vs bronchioles

A

bronchi have cartilage

14
Q

Epithelium in bronchioles

A

ciliated simple columnar with occassional goblet cells

15
Q

Clara cells found in

A

bronchioles

16
Q

Opening of each alveolus controlled by

A

single sm muscle cell

contraction may reduce size

17
Q

Alveolar pores

A

help to regulate pressure differences between alveolar sacs

18
Q

Collagen in alveoili

A

type III collagent

19
Q

Goblet cells function

A

secrete mucus

20
Q

Type I vs type II pneumocytes

numbers

A

II > I

but I are huge, cover 95% of alveolar surface

21
Q

Beginning of respiratory portion

A

respiratory bronchioles

22
Q

Clara/club cell function

A

secrete glycoprotein

prevents collapse

degrade inhaled toxins via CYP450s

divide to regenerate bronchiolar epithelium

23
Q

Epiglottis cartilage

A

elastic

24
Q

Type II pneumocyte

epithelium type

A

cuboidal

25
Q

Surfactant lipids

A

dipalmitoyl phosphotydylcholine

phosphatidylglycerol

26
Q

Alveolar macophages

A

phagocytose excess surfactant

and particular matter

27
Q

Surfactant is phagocytosed by

A

type II pneumocytes and alveolar macrophages

28
Q

Blood-gas barrier made up of

A

type I pneumocytes

29
Q

Sympathetic innervation to lung

A

bronchodilation

30
Q

Parasympathetic innervation to lungs

A

bronchoconstricts

31
Q

Type I pneumocytes

epithelium type

A

simple squamous epithelium

32
Q

Tracheal rings cartilage

A

hyaline

33
Q

Thyroid and cricoid cartilages

A

hyaline

34
Q

Bronchi vs bronchioles

A

bronchi: cartilage
bronchioles: sm muscle

35
Q

Clara/club cell type

A

cuboidal

36
Q

Clara/club cells located in

A

bronchioles

37
Q

How are type I alveoli regenerated?

A

type II alveoli are type I alveoli stem cells

and they secrete surfactant