MasteringA&P chapter 21

the partial pressure of oxygen in pulmonary veins during internal respiration is approximately

95 mm Hg.

________ is the amount of air that moves into the respiratory system during a single respiratory cycle under resting conditions.

Tidal volume

The sites of gas exchange within the lungs are the

alveoli.

The opening or closing of the glottis involves rotational movement of the

arytenoid cartilages.

Most of the carbon dioxide in the blood is transported as

bicarbonate ions.

Most of the oxygen transported by the blood is

bound to hemoglobin.

The most important chemical regulator of respiration is

carbon dioxide.

The conchae

create turbulence in the air to trap particulate matter in mucus.

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

greater than the pressure in the atmosphere.

Which of the following would be greater?

hemoglobin's affinity for oxygen when the BPG level is low

Which of the following organs is not part of the lower respiratory system?

oropharynx

The condition resulting from inadequate production of surfactant and the resultant collapse of alveoli is

respiratory distress syndrome.

Which type of epithelium lines the inferior portions of the pharynx?

stratified squamous epithelium

Air traveling from the tertiary bronchi must pass through the ________ to reach the pulmonary lobule.

terminal bronchioles

The glottis is

the opening to the larynx.

Which of the following would be greater?

the percent of oxygen saturation of hemoglobin when the pH is 7.6

All of the below are sensory stimuli that can modify the activities of the respiratory center except

thermoreceptors.

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

they are equal.

If a patient being tested inhales as deeply as possible and then exhales as much as possible, the volume of air expelled would be the patient's

vital capacity

Damage to the type II pneumocytes of the lungs would result in

increased surface tension in the alveoli. a loss of surfactant. increased tendency to alveolar collapse. a decreased rate of gas exchange.

Absorption of O2 from blood and release of CO2 from tissue cells is known as

internal respiration.

Boyle's law states that gas volume is

inversely proportional to pressure.

Respiratory minute volume, VE:

is calculated by multiplying the respiratory rate, f, by the tidal volume, VT.

The vocal folds are located within the

larynx.

The beating of the cilia of the respiratory passages in the direction of the pharynx forms the

mucus escalator.

The auditory tubes open into the

nasopharynx.