Lecture 26 - Respiratory 1

Question 1

airways are always lined with:

Answer 1

epithelium
A liquid (mucus/club cell secretion/surfactant)
ciliated except in alveoli
contains their own blood supply (bronchial supply) in their walls

Question 2

what happens to airways as they branch?

Answer 2

they narrow

Question 3

describe pulmonary arteries as the airways branch

Answer 3

the pulmonary arteries also narrow with branching

Question 4

describe the larger airways

Answer 4

need support to stay open e.g cartilage
conduct - move air to smaller airways
higher up so need more protection against infection

Question 5

describe smaller airways

Answer 5

can stay open without cartilage
contain smooth muscle to control airflow

Question 6

list the structure of the conducting airways from deep to superficial

Answer 6

1. ciliated cells and goblet cells or club cell secretions
2. lamina propria
3. smooth muscle
4. mucous glands
5. cartilage