Respiratory Physio Questions

Question 1

How are Type I and Type II alveolar cells different?

Answer 1

Alveolar Type I cells: site of gas exchange

Alveolar Type II cells: Produce surfactants that are secreted onto the inner surface of alveoli

inhaled anesthetics work through aveolar type I cells

Question 2

How is surfactant from Type II alveolar cells useful?

Answer 2

reduces water surface tension and supports inflation of lungs

Question 3

What is the PNS and SNS effect on lungs?

Answer 3

PNS effect:
Bronchoconstriction mediated by muscarinic (3?) cholinergic receptors

SNS (and epinephrine) effect:
Bronchodilation mediated by beta2 adrenergic receptors

Question 4

How are mucus glands and bronchial glands different?

Answer 4

Mucus glands: Produce and secrete mucus into airways

Bronchial glands: Secrete H20 to keep airways moist and mucus moving & not too viscous