Airway Resistance and Breathing Cycle

Question 1

The major site of airway resistance

Answer 1

medium-sized bronchi

Question 2

Cite the 3 factors affecting airway resistance.

Answer 2

1. Bronchial Smooth Muscle
2. Lung Volume
3. Viscosity/Density of inspired gas

Question 3

Low density gas ___ (increases, same, decreases) resistance to airflow

Answer 3

Decreases/reduces

Question 4

Factors that causes bronchodilation (cite 3)

Answer 4

1. Sympathetic Nervous System
2. Atropine
3. Vasointestinal Peptitide

Question 5

Factors causing bronchoconstriction

Answer 5

1. Cholinergic
2. Cool air
3. Exercise
4. Irritants
5. Leukotrienes
6. Histamine

Question 6

Cite the formula for Poiseuille Law

Answer 6

R = (8nl)/(pi r^4)

Question 7

If the lungs is inflated by saline solution, the air resistance ___ (decrease, same, increase)

Answer 7

decrease

Question 8

At FRC, the alveolar pressure is equal to ___ (0,1,2)

Answer 8

0

Question 9

During inspiration, the alveolar pressure is ___ (lesser, equal, greater) than the atmospheric pressure

Answer 9

less

Lesser para pumasok yung hangin

Question 10

The contraction of the diaphragm causes a ___ (decrease, increase) in intrapleural pressure

Answer 10

Decrease