Chest and lungs Flashcards
(176 cards)
primary muscles of respiration (2)
diaphragm and intercostals
which intercostals are important to inspiration?
external
which of the lobes on the left lobe contains the lingula?
left upper lobe
at what rib levels (axilla and anterior) is the oblique fissure on the right? on the left?
5th rib in axilla and 6th rib at midclavicular; 6th rib at midclavicular
posteriorly the apexes of the lungs rise to what vertebral level?
T1
upon deep inspiration the lower borders of the lungs descend to which vertebral level?
T12
upon forced expiration the lower borders of the lungs ascend to which vertebral level?
T9
at what vertebral level does the trachea bifurcate?
T4/5
main bronchi are divided into ____ branches on the right and ____ on the left
3:2
acini consists of these 4 parts:
respiratory bronchioles, alveolar ducts, alveolar sacs and alveoli
bronchial arteries branch from where? (2)
anterior thoracic aorta and intercostal arteries
most of the blood from the lungs is drained via the:
Pulmonary Veins
chemoreceptors are found in these 2 places and each is stimulated by what
medulla oblongota (H+) and carotid body (low O2 and high CO2)
chemoreceptors send signals to the respiratory center in this part of the brain
medulla oblongota
nerve impulses from the medulla send signals to this part of the brain that controls respiratory muscles
Pons
anterior right lung consists mainly of which 2 lobes?
upper and middle
posterior lung is mainly which lobe(s)?
lower lobe
lower lobe extends between which vertebral levels?
T3-T10/12
at what rib levels is the horizontal fissure at axilla and anteriorly?
axilla at 5th rib and anteriorly at 4th rib
the lateral lung extends between which landmarks?
peak of axilla to 7th or 8th rib
the number of each intercostal space corresponds to that rib immediately below/above it?
above
is the resistance in the pulmonary circulation less than or greater than that in systemic circulation?
less than
what stimulates the closure of the foramen ovale?
decrease in pulmonary pressure
what stimulates the closure of the ductus arteriosus?
increase in O2 tension in arterial blood