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Type 2 cells

Secrete a fluid containing surfactant, cuboidal epithelial cells, interspersed among the type 1 cells.

Type 1 cells

The respiratory membrane is composed of fused basal laminas of the capillary walls and _________. Thin, squamous epithelial cells.

terminal bronchioles

No exchange of gas occurs here.

Alveolar duct

terminates in alveoli. airway that branches from smallest bronchioles

Respiratory bronchioles

Where the respiratory zone of the lungs begins.

Respiratory bronchioles

Composed of simple squamous epithelium.

Type 2 cells

Composed of cuboidal cells, interspersed among the type 1 cells. Secrete pulmonary surfactante

Terminal bronchioles

Composed of cuboidal cells, what are the smallest bronchioles called


_______ respiration - process of oxygen and carbon dioxide exchange at the cellular level when oxygen leaves the bloodstream and is delivered to the tissues


t or f: There is glandular tissue in nose.

paranasal sinus

any of the paired sinuses in the bones of the face adjacent to the nasal cavity that are lined with mucous membrane that is continuous with lining of the nasal cavities


Intrapleurlal pressure is normally about _____ mm Hg less than pressure in alveoli

carbonic anhydrase

Converts CO2 into bicarbonate, enzyme that catalyzes reaction between carbon dioxide and water to form carbonic acid


thread, groove along the medial surface of the lung, that provides entrance to pulmonary vessels, nerves and lymphatics.


a flap of cartilage that covers the windpipe while swallowing


Air and food are routed into the proper channels by the ___________. tubelike passageway for food, liquid, and air.


______ Law explains the relationship between the pressure and volume of gases... pressure increase, volume decrease (temp. constant)


the _______ effect -- more oxygen is released because a decrease in pH (acidosis) weakens the hemoglobin-oxygen bond.


the Bohr effect -- more oxygen is released because a decrease in pH (acidosis) _______ the hemoglobin-oxygen bond.


Another name for the inflation reflex is the ___________.


factors that decrease the surface tension of the fluid film in alveoli does not diminish ___________.


the _____ of lungs is an indication of their expandability, or how easily they expand and contract.


In fetus, respiratory exchanges are made through the ________.


More CO2 is carried in _______ than is dissolved in blood plasma.


Oblique fissure, horizontal fissure, middle lobe, are found on right _____.

gas emboli

A _______ ________ may occure because a diver holds his breath upon ascent., injection of air, from chest wounds, injection of air, from chest wounds


The respiratory rate of a newborn is approximately ____ respirations per minute., the cardinal number that is the product of ten and three


voice box; passageway for air moving from pharynx to trachea; contains vocal cords


its accumulation in blood is associated with a decrease in pH


Its concentration in blood is decreased by hyperventilation.

primary bronchi

The first branches of the trachea. There are two primary bronchi, one for each lung.

visceral pleura

Membrane that covers the lungs


a cartilaginous structure at the top of the trachea

secondary bronchi

Arising from the primary bronchi, these serve as an airway for each lobe in the lungs; three in the right lung and two in the left lung (smaller)


membranous tube with cartilaginous rings that conveys inhaled air from the larynx to the bronchi. Windpipe.

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