The Respiratory System (EXAM 1)

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The "C" in COPD stands for

chronic

Functions of the nasal cavity include all of the following except

cooling the air

The conchae

create turbulence in the air to trap particulate matter in mucus

The lungs are divided into lobes by structures called

fissures

After a quiet expiration, the amount of air in your lungs is called the

functional residual capacity.

Expiratory movements are produced by contraction of the ________ muscle(s).

internal intercostal

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

internal respiration.

The process by which dissolved gases are exchanged between the blood and interstitial fluids is

internal respiration.

Boyle's law states that gas volume is

inversely proportional to pressure

Higher brain centers that alter the activity of the respiratory centers include all of the following except the

pons

The respiratory defense system is important for all of the following reasons except

providing gas exchange

Which of the following systems is responsible for gas exchange?

respiratory

The respiratory membrane of the gas exchange surfaces consists of

simple squamous epithelium.

Which of the following would be greater?

the percent of oxygen saturation of hemoglobin when the temperature is 20 degrees centigrade

Henry's law states that

the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas.

When the diaphragm and external intercostal muscles contract,

the volume of the thorax increases.

The visible and palpable prominence on the throat known as the Adam's apple is part of the

thyroid cartilage.

The airway that connects the larynx to the bronchi is the

trachea.

The sites of gas exchange within the lungs are the

alveoli

Air remaining in the conducting portion of the respiratory system that does not reach the alveoli is known as

anatomic dead space

A period in which breathing has stopped, followed by a forceful expulsion of air, is termed

apnea

Prolonged deep inspirations can result from stimulating the ________ center.

apneustic

If the fluid bond between the parietal and visceral pleura is broken and the lung collapses, the resulting condition is termed

atelectasis.

Which structure leads to the middle ear?

4

The most important chemical regulator of respiration is

carbon dioxide

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

mucus escalator.

The nasal cavity is divided into left and right portions by the

nasal septum

Identify the structure labeled "7."

oropharynx

________ is the amount of air that you can inhale above the resting tidal volume.

Inspiratory reserve volume

What does not happen to a carbon dioxide molecule once it enters the bloodstream?

It binds to heme groups in hemoglobin.

Which of the following is false about the pharynx?

It is shared by the integumentary and respiratory systems.

Which of the following is the best explanation for the C shape of the tracheal cartilages?

Large masses of food can pass through the esophagus during swallowing.

Which of the following statements about bronchioles is true?

Sympathetic action causes bronchodilation

Which of the following factors would increase the amount of oxygen discharged by hemoglobin into peripheral tissues?

decreased pH

The vocal folds are located within the

larynx


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