Ch 25

This is the primary gas exchange site within the lung:

Alveolus

Which of the following is not part of the upper respiratory system?

trachea

The passageway that ends at air sacs in the lungs is the:

Bronchiole

How is oxygen transported through the blood?

bound to hemoglobin

This is located anterior to the esophagus and carries air to the bronchi.

trachea

These are two triangular pieces of mostly hyaline cartilage located at the posterior and superior border of the cricoid cartilage and attached to the true vocal cords:

Arytenoids cartilage

Which is the dominant method of carbon dioxide transport?

Dissolved in plasma as bicarbonate ions

When blood becomes more acidic:

Hemoglobin releases oxygen more easily

Exhalation begins when

Inspiratory muscles relax

The nose connects with the throat through the:

Internal snare

The portion of the pharynx that opens to the mouth is called the :

Oropharynx

This is direction of diffusion of gases at the alveoli of the lungs.

Oxygen into blood, Carbon dioxide out of blood

The conducting airways with the air that does not undergo respiratory exchange are known as the

Respiratory dead space

Pitch is controlled by

Tension of the vocal chords

These are cells of the alveoli that produce surfactant.

Type II alveolar cells

The point where the trachea divides into right and left primary bronchi is a ridge called

carina

Which of the below tissues provides the functions of the lining of the walls of the conducting organs?

ciliated pseudostratified columnar epithelium with goblet cells

This structure prevents food or water from entering the trachea.

epiglottis

This is the sum of the residual and the expiratory reserve volume.

functional residual capacity

Which of the below tissues maintains open airways in the lower respiratory system?

hyaline cartilage

This is direction of diffusion of gases at capillaries near systemic cells.

oxygen out of blood, carbon dioxide into blood

During swallowing, which structure rises?

pharynx

Which of the following is a passageway for air, food and water?

pharynx

Which is a factor that does NOT affect hemoglobin's affinity for oxygen?

respiratory rate

Which of the below tissues forms the exchange surfaces of the alveolus?

simple squamous epithelium