Chapter 23 Flashcards
What is the name of nostrils of the nose?
external nares
What is the name of the cartilage surrounded space just inside the nostrils?
vestibule
What is the name of the partition that divides the nasal cavity into right and left halves?
nasal septum
What is the name of the scroll-like projections of mucosa lined bone in the nasal cavity?
conchae
What is the name of the epithelium that has receptors for smell?
olfactory
What is the name of the posterior opening from the nasal cavity into the nasopharynx?
internal nares
What structure lies above the soft palate?
nasopharynx
What structure extends from the soft palate to the level of the hyoid bone?
oropharynx
What structure lies posterior to the larynx?
laryngopharynx
What two cartilages elevate to close off the respiratory tract during swallowing?
thyroid and cricoid
Describe the shape of the tracheas cartilaginous rings
c shape
what are the branches of the trachea
primary bronchi
how many primary bronchi are there
2
which pleural membrane lines the outer surfaces of the lungs
visceral pleura
which pleural membrane lines the inner thoracic wall
parietal pleura
what fissure divides the lungs into superior and inferior lobes?
oblique
what fissure divides the right upper lobe into superior and middle lobes?
horizontal
how many secondary bronchi are in the right lung?
3
how many secondary bronchi are in the left lung
2
How many tertiary bronchi are in the left lung?
10
How many tertiary bronchi are in the right lung?
10
What part of the respiratory system directly supplies the bronchopulmonary system?
bronchiole
how many bronchopulmonary segments are in the right lung?
10
how many bronchopulmonary segments are in the left lung?
10
what effect does parasympathetic nerve stimulation have on the size of the bronchioles?
contracts smooth muscle
what effect does sympathetic nerve stimulation have on the size of the bronchioles?
relaxes smooth muscle
what is the last finest bronchiole?
terminal bronchiole
what are the branches of the terminal bronchioles
respiratory bronchioles
where does the direct exchange of gasses occur?
respiratory membrane
which alveolar cell is responsible for engulfing debris and foreign particles in the lungs?
alveolar macrophage
which alveolar cell is responsible for maintaining the reticular and elastic membranes of the alveolus?
fibroblasts
which alveolar cell is responsible for producing surfactant?
pneumocyte type 2
which alveolar cell is the main site of gas exchange?
pneumocyte type 1
what structure directly feeds air into the alveoli?
alveolar duct
what happens to the lung pressure when the volume of the lung increases?
pressure decreases
what happens to the lung pressure when the volume of the lung decreases?
pressure increases
what happens to the movement of air when the volume of the lung increases
inhalation
what happens to the movement of air when the volume of the lung decreases
expiration
does greater compliance make it easier or harder to fill and empty the lungs
easier
does lesser compliance make it easier or harder to fill and empty the lungs
harder
what muscle is responsible for deep breathing
diaphragm
what muscles are responsible for shallow breathing
external intercostals
what muscles are responsible for forced breathing
Accessory muscles: sternocleidomastoid, scalene, pectoralis minor
what is the definition of respiratory rate
number of breaths taken each minute
what happens when the pressure within the lungs is greater than the atmospheric pressure
expiration - air leaves
what happens when the atmosperic pressure is greater than the pressure within the lungs?
inspiration- air rushes in
what type of respiration is the exchange of gases between the blood and lungs?
external respiration
what type of respiration is the exchange of gases between blood and tissues?
internal respiration
what would happen if the partial pressure of oxygen in the capillary is greater than the partial pressure of oxygen in the tissues?
oxygen would go to the tissues
Which area in the pons stimulates the inspiratory area in the medulla?
Apneustic
Which area in the pons inhibits the inspiratory area in the medulla?
pneumotaxic