Question 1
How many lobes does the right human lung have?
Three Lobes
Question 2
Air and food pass in which one of the following areas:
Trachea
... [Show More] Nasopharynx Oropharynx Alveoli
Question 3 Rings of cartilage line much of the respiratory tract. In which of one the following would cartilage NOT be found?
Trachea Larynx Bronchi Alveoli
Question 4 Label the following five items from the diagram:
A – Nasal Cavity B
C - Soft Palate
E - Glottis
F - Trachea
G - Esophagus
H - tongue
Question 5
Explain what happens to the epiglottis during swallowing. Why?
The trachea is closed by the epiglottis. The epiglottis moves inferiorly, covering the trachea. This is to prevent food or liquid from entering the lungs.
Explain at least two differences between Type I and Type II alveolar cells.
a. Type I form the very thin simple squamous epithelium of the alveoli in junction with capillaries. Make up roughly 95% of alveolar epithelial cells.
b. Type II produce and secrete pulmonary surfactant which is needed throughout the alveolar surface to keep the alveoli open. In addition, Type II cells can divide to replace damaged Type I cells. Make up roughly 5% of alveolar epithelial cells.
True/False: Negative pressure is used to move air into the lungs. TRUE
True/False: During inhalation the diaphragm contracts to pull the lungs open. FALSE
True/False: During inhalation the rib cage is lowered pull the lungs open. FALSE (rib cage is lifted upward during inhalation)
True/False: As the thoracic cavity expands and lung volume increases, the density of the gases filling the lungs increases. FALSE (density of gases decreases)
: As the rib cage expands during inhalation, air will naturally flow into lungs. TRUE (air will naturally flow into the lungs because of the negative pressure inside the lungs)
According to Charles's Law gas volume is: Directly proportional to its temperature
Which one of the following tracheal cartilages are paired? Thyroid
Cricoid Arytenoid Epiglottal Hyaline
Which one of the following is not true of the pleurae? The pleurae are membranes that cover surfaces
Parietal pleurae cover the surfaces surrounding the lungs
Visceral pleurae cover the diaphragm
A healthy pleural cavity is nearly empty of air or fluid
Which one of the following is not true of the bronchioles?
Bronchioles can contain respiratory epithelium ; Bronchioles contain cartilage and goblet cells
Bronchioles can contain simple squamous cells
Bronchioles can contain fossae and mucus [Show Less]