What is the relationship between the change in size of the thoracic cavity and the pattern of air movement in and out of the lungs?
What will be an ideal response?
When the chest cavity enlarges, the pressure inside is reduced to below that of the air outside the chest, and so the air flows into the area of reduced pressure. When the chest cavity is compressed, the internal pressure is increased above that outside the chest and the air exits.
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Sheep should be dewormed every ______ months
Fill in the blank(s) with correct word
The trachea
A) is lined by dense regular connective tissue. B) is reinforced with C-shaped cartilages. C) contains the vocal cords. D) always maintains the same diameter. E) ends distally at the level of the diaphragm.
During quiet expiration,
A. thoracic cavity volume decreases. B. the diaphragm and external intercostal muscles contract. C. inspiratory neurons in the VRG spontaneously depolarize. D. air moves from the atmosphere to the alveoli.
Kartagener's syndrome, characterized by frequent respiratory infections, arises from a defect in which respiratory structure?
a. Cartilage in bronchi b. Cilia in respiratory epithelia c. Goblet cells in bronchioles d. Pulmonary alveolar capillaries e. Surfactant in alveolar cells