Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Where does gas exchange occur in the lungs?
|
Air sacs (alveoli)
|
|
|
What are the six layers under alveolar capillary (in the correct order)?
|
1. Type I
2. Type II (surfactant) 3. Alveolar epithelium 4. Epithelial basement membrane 5. Capillary basement membrane 6. Capillary lumen Then red blood cell... |
|
|
What is the equation for Dalton's law of partial pressure?
|
Total pressure x Fractional gas concentration
|
|
|
What is the partial pressure for pulmonary artery?
|
O2= 40 mmHg
Co2= 46 mmHg |
|
|
What is the partial pressure for pulmonary veins?
|
O2= 100 mmHg
Co2= 40 mmHg |
|
|
What is Fick's Law?
|
Diffusion of gases
|
|
|
What does the diffusion rates of O2 and Co2 depend on?
|
The partial pressure differences across the membrane and the area available for diffusion
|
|
|
What is tidal volume (TV)?
|
The volume inspired or expired with each normal breath
|
|
|
Which lung volume is used during exercise?
|
Inspiratory reserve volume (IRV)
|
|
|
What is residual volume?
|
The volume that remains in the lungs after a maximal expiration.
|
|
|
Which lung volume can not be measured by spirometry?
|
Residual volume
|
|
|
What is the most important muscle for inspiration?
|
The diaphragm
|
|
|
T of F
The external intercostals and accessory muscles are used for inspiration |
False
|
|
|
What are the external intercostals and accessory muscles used for?
|
exercise
|
|
|
T of F
When contraction of the diaphragm occurs the abdominal contents are pushed up. |
False
|
|
|
Why is expiration normally passive?
|
The lung chest wall system is elastic, it returns to it's resting position after inspiration.
|
|
|
When are expiratory muscles used?
|
During exercise or when airway resistance is increased b/c of disease
|
|
|
What does the abdominal muscles do?
|
Compress the abdominal cavity, push the diaphragm up, and push the air out of the lungs
|
|
|
What do the internal intercostal muscles do?
|
Pull the ribs downward and inward
|
