Chp. 23 - Respiratory

The nasal cavity, pharynx, and larynx constitute the ________ portion of the airway.

conducting

External respiration involves the

diffusion of gases between the interstitial fluid and the external environment.

The ________ is shared by the respiratory and digestive systems.

esophagus

The partial pressure of oxygen in atmospheric air at sea level is

greater than the partial pressure of oxygen in the atmospheric air at the top of Mt. Everest

Air moves out of the lungs when the pressure inside the lungs is

greater than the pressure in the atmosphere

Children have slender, short vocal cords so their voices tend to be

higher pitched

Functions of the nasal cavity include all of the following except

housing tonsils.

Which pressure remains negative throughout the respiratory cycle?

intrapleural

Inhaling through the nostrils is preferred over the mouth because

it allows better conditioning of the inhaled air.

Hering-Breuer reflex

protects the lungs from damage due to overinflation.

Most of the carbon dioxide in the blood is transported as

bicarbonate ions.

The most important chemical regulator of respiration is

carbon dioxide

Which of these factors does not affect hemoglobin's affinity for oxygen?

electrolyte balance

The obstructive lung disease in which connective tissues are lost, alveolar surfaces are damaged, and the respiratory surface is reduced is called

emphysema

The C shape of the tracheal cartilages is important because

large masses of food can move through the esophagus.

The larynx, trachea, bronchi, and bronchioles all make up the

lower respiratory tract

The physical movement of air into & out of lungs is termed

pulmonary ventilation

When there is no air movement, the relationship between the intrapulmonary & atmospheric pressure is that

they are equal