Chapter 21 Flashcards
Which of the following airways is located between the larynx and primary bronchi?
Trachea
Which of the following factors does not effect the rate of external respiration?
Volume of the alveolus
Which of the following is not an necessary event to supply the body with oxygen and remove carbon dioxide?
Blood pH adjustment
Air moves out of the lungs because:
the volume of the lungs decreases with expiration
Most of the oxygen transported by the blood is:
bound to hemoglobin
Surfactant prevents the alveoli from collapsing by:
interfering with the cohesiveness of of water molecules, thereby reducing the surface tension of the alveoli.
Boyle’s law describes gas volume as which of the following?
Inversely proportional to pressure.
The right lungs is divided into how many lobes?
3
Which of the following results from inadequate surfactant production and is associated with alveolar collapse?
Respiratory distress syndrome.
The larynx is made up of how many cartilages?
9
Which of the following occurs when, a newborn, at birth takes its first breaths?
The pressure in the lungs decreases?
Which of the following occurs in emphysema?
Destruction of the alveoli and bronchioles.
Which of the following is a function of the nasal conchae?
To create turbulence in the air to trap small particulates in mucus.
Which of the following is not a function of the nasal cavity?
Acting as a reservoir during coughing
Which of the following cannot elevate the ribs?
External oblique
The left lung consists of how many lobes?
2
Which of the following are the main sites of gas exchange in the pulmonary tract?
Alveoli
Sympathetic stimulation to the smooth muscle tissue layer in the bronchioles causes which of the following?
Bronchodilation
The dead space has a volume of approximately:
150 mL.
Which of the following is true about the glottis?
It is the opening to the larynx.
Normal breathing is called:
eupnea
Tension on the vocal cords is regulated by which of the following?
Intrinsic laryngeal muscles
The average respiratory rate in a normal adult is:
12 to 15 respirations per minute.
The primary bronchi are found near the level of which thoracic vertebra?
Fifth
The relationship between pH and the hemoglobin saturation curve is called:
the Bohr effect
The respiratory membranes consists primarily of which of the following?
Simple squamous epithelium
Which of the following is true about the partial pressure of oxygen?
It is lower in the tissues
