respiratory L19

Question 1

what is the epithelium that lines conducting zone?

Answer 1

pseudostratified ciliated epithelium

Question 2

what are the structures found in the bronchus?

Answer 2

ciliated epithelium, goblet cells, smooth muscle, mucus glands, cartilage plate

Question 3

what is the main function of the bronchus?

Answer 3

conducting air

Question 4

What is the main function of bronchioles?

Answer 4

-control flow of air
-Smooth muscle allows for constriction and relaxation

Question 5

what is providing the tone to the wall of the bronchioles?

Answer 5

smooth muscle as no cartilage

Question 6

what structures are absent in the bronchioles?

Answer 6

cartilage, goblet cells, mucus glands

Question 7

What structures are present in the bronchioles?

Answer 7

-smooth muscle, columnar ciliated cells, club cells

Question 8

club cell secretion

Answer 8

secreted by club cells in the bronchioles
more watery, antimicrobial, can still capture dust particles and move it

Question 9

what condition affects bronchioles?

Answer 9

asthma. Constriction of bronchioles

Question 10

how does asthma inhaler work?

Answer 10

relaxes smooth muscle in the bronchioles- bronchodilator
(salbutamol)

Question 11

how to check for asthma?

Answer 11

give salbutamol and see if weezing subsides

Question 12

is there gas exchange in the respiratory bronchioles?

Answer 12

no too thick

Question 13

what are the 3 major cells in the alveoli?

Answer 13

-type 1 cells( squamous pneumocytes)
type 2( surfactant cell) - secretes surfactant
Alveolar macrophage

Question 14

what is the main function of the surfactant that is secreted by surfactant cells in the alveoli?

Answer 14

reduce the tension on the water layer lining the alveoli
alveoli would collapse if there was only a water layer

Question 15

what is the width of the diffusion barrier in the alveoli?

Answer 15

0.5 um- 500 nm