Respiratory System II

Question 1

Is the secondary lobule of miller present of the lung or pleural tissue

Answer 1

pleura

Question 2

What structures are held within the secondary lobules of miller

Answer 2

terminal bronchioles, respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli

Question 3

Respiratory bronchioles are lined by… epithelium

Answer 3

ciliated cuboidal

Question 4

T/F: The epithelium on the respiratory bronchiole is discontinuous

Answer 4

T, the epithelium is incomplete where the alveoli come off of the respiratory bronchiole

Question 5

T/F: The alveoli coming off of the respiratory bronchioles are lined by the same type of epithelium

Answer 5

F, they are lined by simple squamous epithelium

Question 6

In addition to the ciliated cuboidal cells, what other cells lie in the epithelium of the respiratory bronchioles

Answer 6

clara cell

Question 7

A respiratory bronchiole divides to form two…

Answer 7

alveolar ducts

Question 8

The alveolar duct is lined by…

Answer 8

simple squamous epithelium

Question 9

What are interalveolar septa

Answer 9

walls between alveoli

Question 10

Interalveolar septa are rich in…

Answer 10

BV and elastic fibers (responsible for elasticity of the lung)

Question 11

Destruction of the inter alveolar septum is a sign of…

Answer 11

emphysema

Question 12

Role of Pores of Kohn

Answer 12

help equilibrate pressure and aid in communication between adjacent alveoli

Question 13

What passes in and out of pores of Kohn

Answer 13

dust cells

Question 14

What are the two types of cells in the alveolus

Answer 14

Type I and II pneumocytes

Question 15

What type of cell is the type I pneumocyte

Answer 15

simple squamous epithelial cell type

Question 16

Describe the distribution of organelles in the type I pneumocyte (TIP)

Answer 16

Organelles are clustered around nucleus (leaving attenuated lateral surfaces)

Question 17

TIP contains…vesicles to collect debris from the alveolar lumen to transfers them to…

Answer 17

pinocytotic…macrophages

Question 18

T/F: The TIP doesn’t participate in the blood-air barrier

Answer 18

F

Question 19

What is the function of the blood-air barrier

Answer 19

external respiration (therefore the barrier must be thin)

Question 20

What is the blood air barrier comprised of

Answer 20

TIP, single basal lamina created by the fusion of the lamina of the alveolar epithelial and capillary endothelial cell, and the simple squamous epithelial cell of the capillary

Question 21

T/F: TIPs comprise 95% of alveolar surface and are those more numerous than TIIPs?

Answer 21

F TIIPs are more numerous

Question 22

Morphology of TIIP

Answer 22

Cuboidal cell with microvilli on apical surface

Question 23

Key morphological feature of TIIP seen with EM

Answer 23

lamellar body

Question 24

What is the sectretory product of the lamellar body

Answer 24

surfactant

Question 25

Role of surfactant

Answer 25

prevents the alveoli from deflating during expiration

Question 26

Mitosis of TIIPs leads to...

Answer 26

TIPs

Question 27

Where are dust cells commonly found

Answer 27

interalveolar septum or lumen

Question 28

Macrophages in the lung tissue have surface receptors for...and....

Answer 28

IgG and Cb3

Question 29

Dustcells produce chemoattract factor for... in the presence of antigens

Answer 29

neutrophils

Question 30

Systemic circulation: Bronchiole arteries supply...

Answer 30

bronchi and bronchioles

Question 31

Alveoli are supplied by

Answer 31

diffusion through capillary beds

Question 32

Branches of the pulmonary arteries are found...

Answer 32

next to bronchi and bronchioles

Question 33

T/F: Plumonary veins do not run adjactent to bronchi/bronchioles

Answer 33

T That run independently

Question 34

Where would you expect to find capillaries in the lung

Answer 34

underlying the alveoli for gas exchange

Question 35

Where would you expect to find bronchiole a.

Answer 35

within the walls of bronchi and bronchioles