What is the primary factor that determines airway resistance in the respiratory passageways?
One of the most important factors influencing airway resistance is the diameter of the airway. In general, the opposition of flow can be described as the pressure divided by the rate of flow (R = change in P/V). However, factors such as turbulent or laminar flow also impact the resistance to flow in the lungs.
What is the primary determinant of airway resistance?
Airway resistance is the resistance to flow of air caused by friction with the airways, which includes the conducting zone for air, such as the trachea, bronchi and bronchioles. The main determinants of airway resistance are the size of the airway and the properties of the flow of air itself.
What is the most important factor in determining airway resistance quizlet?
Airway radius is the most important factor in determining airway resistance. This radius is regulated by the autonomic nervous system by way of the state of smooth muscle tone in this region.
What factors increase airway resistance?
Factors which affect airway resistance by affecting airway diameter
- Increased smooth muscle tone. Bronchospasm. Irritants, eg. histamine. Parasympathetic nervous system agonists.
- Decreased smooth muscle tone. Bronchodilators. Sympathetic nervous system agonists.
Sep 25, 2019
Which factors can increase airway resistance quizlet?
Airway resistance will increase as we move towards lower lung volumes. As a result, there's a point inside chest cavity at which P inside airways is equal to P outside airways -> EPP or Equal Pressure Point….
- strength of chest and abdominal muscles.
- airway resistance.
- lung size and.
- elastic properties.
Where does the most airway resistance in our respiratory system occur quizlet?
-Airway resistance during inspiration increases. -In healthy lungs, the overall resistance in the conducting zone is high. -The radius of an individual bronchiole is low, but the overall cross-sectional area of all the bronchioles is quite high.
Where is the major site of airway resistance explain the reason why?
An individual small airway has much greater resistance than a large airway, however there are many more small airways than large ones. Therefore, resistance is greatest at the bronchi of intermediate size, in between the fourth and eighth bifurcation.
What factors determines lung compliance quizlet?
Lung compliance is determined by two factors; how distensible the lungs are and the alveolar surface tension. The more distensible the lungs and the lower the surface tension, the greater the lung compliance and this favors efficient ventilation.
How does lung volume affect airway resistance?
Airway resistance decreases as lung volume increases because the airways distend as the lungs inflate, and wider airways have lower resistance.
What is the normal airway resistance quizlet?
about 150 ml, influenced by body size, build, and state of health. What is alveolar ventilation?
Which of the following are causes of increased airway resistance quizlet?
Excess mucus obstructs airways causing increased airway resistance. What kind of lung disease is Bronchitis?
Which of the following determines lung compliance?
What determines lung compliance? It is determined by destinsibility of the lung tissue and aveolar surface tension.
Which of the following is most important factor to determine lung compliance quizlet?
Which is most important? One factor determining lung compliance is the stretchability of the lung tissues, particularly their elastic connective tissues. The other is the surface tension at the air-water interfaces within the alveoli. The surface tension is typically more important.
What is meant by airway resistance?
Airway resistance is the opposition to flow caused by the forces of friction. It is defined as the ratio of driving pressure to the rate of air flow. Resistance to flow in the airways depends on whether the flow is laminar or turbulent, on the dimensions of the airway, and on the viscosity of the gas.
What causes a decrease in airway resistance?
The increased sympathetic tone causes the relaxation of airway smooth muscle, which causes dilation of the bronchi and bronchioles, reducing airway resistance.
What is airway resistance and lung compliance?
Dynamic Compliance: It is the continuous measurement of pulmonary compliance calculated at each point representing schematic changes during rhythmic breathing. (2) It monitors both elastic and airway resistance. Airway resistance depends on the air viscosity, density, and length, and radius of airways.
What determines lung compliance quizlet?
What determines lung compliance? It is determined by destinsibility of the lung tissue and aveolar surface tension.
How do you measure airway resistance?
Airway resistance is the ratio of driving pressure to the rate of the airflow in the airways. The most frequent methods used to measure airway resistance are whole-body plethysmography, the interrupter technique and the forced oscillation technique.
Where does the most airway resistance in our respiratory system occur?
In healthy lungs, the overall resistance in the conducting zone is high. The radius of an individual bronchiole is low, but the overall cross-sectional area of all the bronchioles is quite high. During quiet breathing, the difference between Palv and Patm is less than 2 mmHg.
What conditions may affect lung compliance and airway resistance?
Factors affecting lung compliance include elasticity from the elastin in connective tissue and surface tension, which is decreased by surfactant production.
Where in his airway The resistance is highest and why?
An individual small airway has much greater resistance than a large airway, however there are many more small airways than large ones. Therefore, resistance is greatest at the bronchi of intermediate size, in between the fourth and eighth bifurcation.
Where is resistance greatest in the respiratory system?
So, due to the vast number of bronchioles that are present within the lungs running in parallel, the highest total resistance is actually in the trachea and larger bronchi.