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WorksheetsDR. JONES LUNGS PROPERTIES AND MECHANICS
Total questions: 26
Worksheet time: 1hrs 20mins
Which of the following tries to pull the chest wall outward and also creates an inward pull?
visceral pleura
elastic recoil
intrapleural space
pleural membranes
Which of the following applies when the lungs are at rest? Select all that apply
Lung tissue is very elastic and wants to be small
The chest wall wants to pull out
Lung tissue isn't very elastic
gas pressure in the alveoli
Palv
Patm
gas pressure at the nose and mouth
Patm
Palv
Which of the following is TRUE about Quiet Breathing?
muscle in diaphragm contracts and chest wall, spatial lung volume increase (Boyles Law)
muscle in diaphragm relax and chest wall, spatial lung volume increase (Boyles Law)
Requires lungs have a sub atmospheric pressure for air to move from atmosphere into lungs.
Inspiration
Expiration
Requires lungs have a greater than atmospheric pressure for air to move from the lungs into the atmosphere.
Inspiration
Expiration
Which of the following are the key events when we Inhale? Select all that apply
Expand chest and PIP becomes more negative
Volume in alveoli increase
Pressure in alveoli drops
Air flows into alveoli and fills lungs
Pressures equalize and air flow stops
Which of the following are the key events when we Exhale? Select all that apply
Compress chest PIP becomes less negative
Volume in alveoli decreases
Pressure in alveoli increases
Air flows out
Pressures equalize and air flow stops
Memorize this!
Yes
No
Which of the following are TRUE about a hole in the chest wall? Select all that apply
Cannot generate a PTP to increase lung volume
Equalization of pressures (no gradient), lung collapse
Elastic recoil of the chest wall tries to pull the chest wall outward and creates and inward pull
In Pneumothorax (hole in the chest wall) PTP cannot be generated to increase the lung volume.
True
False
Which of the following is TRUE regarding RESISTANCE? Select all that apply
The greater the resistance to airflow the slower the flow
If we increase the radius, the resistance decrease
Diameter of the bronchioles regulates the resistance
Which of the following is TRUE about the regulation of bronchiole radius in Bronchodilation?
sympathetic via activation of b2 (receptors on smooth muscle)
parasympathetic via muscarinic receptors
contraction
histamine
Which of the following is TRUE about the regulation of bronchiole radius in Bronchiole constriction?
parasympathetic via muscarinic receptors
sympathetic via activation of b2 (receptors on smooth muscle)
relaxation
epinephrine
HIGH CO2
Emphysema is a loss of elastin or elastic fibers that help with recoil during expirations, these patients usually have a higher compliance (floppy lungs).
True
False
Which of the following will have less compliant and will not fill with as much air (more effort to fill with air)?
stiffer lungs
floppy lungs
Which of the following curves show an Increased compliance?
A
B
Which of the following curves show a Normal compliance?
A
B
Which of the following created at the air fluid interface in the alveoli can alter the compliance?
pharynx tension
surface tension
intraventricular tension
exponential tension
Which of the following can reduce surface tension in smaller alveoli?
elastic recoil
surfactant
alveolar epithelial cells
type 1 cells
Which of the following can occur when there is LOW SURFACTANT and the treatment must be CPAP (cannula positive airway pressure) and exogenous surfactant?
Respiratory distress syndrome
Ventricular distress syndrome
What happens when we breath in? Select all that apply
chest expands
diaphragm contracts
chest contracts
diaphragm relaxes
What happens when we breath out? Select all that apply
chest expands
diaphragm contracts
chest contracts
diaphragm relaxes
Which of the following statements is TRUE about Compliance?
The more surfactant we have the more we are able to expand our lungs, so GREATER compliance.
The less surfactant we have the more we are able to expand our lungs, so GREATER compliance.
In asthma which WBC (white blood cells) are responsible ?
leukocytes
eosinophils
monocytes
lymphocytes
T cells and B cells
