Ch.13 Flashcards
The nasal cavity is separated from the oral cavity by the —.
palate
What part of body is the Site of speech production?
Larynx
Larynx is consist of hyaline cartilages and a spoon-shaped flap of elastic cartilage called —.
Epiglottis
What are the functions of the respiratory mucosa in the nasal cavity?
Moisten air
Heat air
Trap incoming foreign particles
What is a lipid molecule produced by septal cells, coats gas-exposed alveolar surfaces?
Surfactant
Which bronchus is the most likely site for an inhaled object to become lodged? Why?
Right bronchus because it is shorter, straighter, and larger.
The lungs are mostly passageways and elastic tissue. What is the role of the passageways? Of elastic tissue?
The passageway conducts air.
The elastic tissue allows lungs to recoil passively when exhaling, saving energy.
Name the 4 structures that make up the respiratory zone.
Alveolar ducts, alveolar sacs, alveoli, respiratory bronchioles
Pulmonary ventilation (breathing) is a Completely mechanical process that depends on ——- in the thoracic cavity
volume changes
What causes air to flow out of the lungs during expiration?
Increased air pressure in the lungs as they recoil.
Normal pressure within the pleural space is always — (intrapleural pressure)
Negative
— is reversed by drawing air out of the intrapleural space with chest tubes, which allows the lungs to reinflate and resume its normal function. It is the presence of air in the intrapleural space, which disrupts the fluid bond between the pleurae.
Pneumothorax
Which is the largest respiratory volume, and the smallest- ERV, IRV, TV, or VC?
VC is the largest and TV is the smallest.
Which type of cellular transport moves respiratory gases between the blood and the body’s cells?
Diffusion
What is the major form in which CO2 is transported in the blood?
Bicarbonate ions (HCO3-)