Which of the following structures is included in the respiratory portion of the respiratory tract?
True
Each pleural cavity actually represents a potential space rather than an open chamber, for the parietal and visceral layers are usually in close contact.
elastic fibers
The capillaries surrounding each alveolus are surrounded by a network of ________.
main bronchi
The carina is an internal ridge that lies between the entrances to the ________.
type II cell
The respiratory membrane consists of all elements, except ________.
nasopharynx
The upper respiratory system consists of the nose, nasal cavity, paranasal sinuses, and ________.
nasopharynx The nasopharynx is part of the upper respiratory system.
The upper respiratory system includes the __________.
cartilage
The walls of the main, lobar, and segmental bronchi contain progressively lesser amounts of ________.
respiratory bronchioles
Which are the thinnest and most delicate branches of the bronchial tree?
type II alveolar cells
Which cell type produces surfactant?
temporal
Which of the following bones does NOT contain a paranasal sinus?
The right lung has three lobes.
Which of the following correctly describes the lungs?
alveoli
Which of the following structures is included in the respiratory portion of the respiratory tract?
vestibular folds
Which structure(s) is/are known as false vocal cords?
submucosa
Within the trachea, the ________ contains mucous glands that secrete mucus onto the epithelial surface through secretory ducts.
