a. A volume left in the airways after the maximal exhalation
b. Not ventilated alveoli
c. A part of tidal volume which is not involved in gas exchange and is exhaled during next breathing cycle
d. All the answers are correct
194.Resistance in airways leads to
a. Decreased Tidal Vol.
b. increased Tidal Vol.
Obstruction in airways causes that
a. Tiffenau index is decreased
b. Inspiration is prolonged
c. Expiration is prolonged
d. Answer a and c are correct
Volume of air inhaled into the lungs depends on pressure changes in a pleural cave and on lung compliance, thus the changes of pressure in the airways result in volume changes of the chest cage.
a. Both sentences are true
b. Both sentences are false
c. Only the second sentence is truth
d. Only the first sentence is truth
11. a preterm infant has a surfactant deficiency. Without surfactant, many of the alveoli collapse at the end of each expiration, which lead to pulmonary failure. Which of the following changes is present in a preterm infant, compared with a normal infant?
Alveolar surface tension vs. pulmonary compliance
--> CHOOSE THE RIGHT PAIR
a. Decreased vs. increased
b. Increased vs. no change
c. Decreased vs. no change
d. Increased vs. decreased
d. increased alveolar surface tension and decreased pulmonary compliance
--> as type II alveolar cells produce surfactant which decreases surface tension to prevent collapse of alveoli
-> pulmonary compliance: is a measure of the lung's ability to stretch and expand (distensibility of elastic tissue)