Physiology - Airways : Obstructive ventilation Flashcards
what is the correct equation for airway reistance
a. pressure in alveoli/flow
b. pressure in brnchus /flow
c. pressure in airways/flow
a.pressure in alveoli/flow
what type of flow leads to vibration and therefore wheeze?
a. laminar
c. turbulent
c.turbulent
which part of the airway has the highest resistance?
a. trachea
b. bronchus
c. bronchioles
d. alveoli
a.trachea
which of these is characterised by reduced compliance?
a. restrictive
b. obstructive
a.restrictive
which of these is characterised by increased airway resistance?
a. restrictive
b. obstructive
b.obstructive
in which of thse is the shape of the volume expired / time graph distorted as the ratio between FEV1 and FVC decreases?
a. obstructive
b. restrictive
a.obstructive
what happens to functional residual capcity in obstructive defects?
a. increase
b. decrease
a.increase
increased airway resistance
what happens to functional residual capcity in restrictive defects?
a. increase
b. decrease
b.decrease
decreased compliance
why does dyspnoea occur in obstructive?
a. increased work due to decreased compliance
b. increased work due to increased AWR
b.increased work due to increased AWR
and hyperinflation so more work against elastance
which airways are compressed in inspiration?
a,intrathoracic
b.extrathoracic
b.extrathoracic
which airways are compressed in forced expiration?
a,intrathoracic
b.extrathoracic
a,intrathoracic
what is the outer layer of the bronchiole made up of?
a. adventitia
b. bronchial smooth muscle
c. lamina propria
d. lumen
a.adventitia
what is the inner ayer of the bronchiole made up of?
a. adventitia
b. bronchial smooth muscle
c. lamina propria
c.lamina propria
which substance increases airway resistance?
a. choline
b. sdrenaline
b.sdrenaline
adrenaline has what effect on smooth muscle in airways?
a. relax
b. contract
a.relax
