Mastering Ch. 21(resp)

25 July 2022
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question
Which of the following is NOT a function of the larynx?
answer
serving as part of the respiratory zone
question
What part of the larynx covers the laryngeal inlet during swallowing to keep food out of the lower respiratory passages?
answer
epiglottis
question
What type of epithelial tissue forms the walls of the alveoli?
answer
simple squamous epithelium
question
Where does gas exchange occur in the respiratory system?
answer
alveoli
question
Which of the following features characterizes the right lung?
answer
presence of a superior, middle, and inferior lobe
question
Which of the following represents all of the processes involved in respiration in the correct order?
answer
pulmonary ventilation; external respiration; transport of respiratory gases; internal respiration
question
Which of the following is NOT a function of the larynx?
answer
to assist in taste sensation
question
__________, the difference between the intrapulmonary and intrapleural pressures, prevents the lungs from collapsing.
answer
Transpulmonary pressure
question
Select the correct statement about the pharynx.
answer
The auditory tube drains into the nasopharynx.
question
Which of the choices below is not a role of the pleura?
answer
aids in blood flow to and from the heart because the heart sits between the lungs
question
The paired lungs occupy all of the thoracic cavity.
answer
False
question
The parietal pleura lines the thoracic wall.
answer
True
question
Tidal volume is air ________.
answer
exchanged during normal breathing
question
The lung volume that represents the total volume of exchangeable air is the ________
answer
vital capacity
question
Atelectasis (lung collapse) renders the lung useless for ventilation.
answer
True
question
Emphysema can result in an ______.
answer
-increased level of carbaminohemoglobin -increased level of deoxyhemoglobin -increased likelihood of the skin of Caucasians developing a slightly blue coloration
question
What is ventilation-perfusion coupling?
answer
matching the amount of gas reaching the alveoli to the blood flow in pulmonary capillaries
question
Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by ________.
answer
diffusion
question
Which of the choices below determines the direction of respiratory gas movement?
answer
partial pressure gradient
question
Oxygen is unloaded where it is most needed when blood pH drops, this is a phenomenon known as ___________.
answer
the Bohr effect
question
What is the most common method of carbon dioxide transport?
answer
as bicarbonate ions in the plasma
question
Which statement about CO2 is incorrect?
answer
More CO2 dissolves in the blood plasma than is carried in the RBCs.
question
Select the correct statement about oxygen transport in blood:
answer
A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
question
Oxygenated hemoglobin releases oxygen more readily when the pH is more basic.
answer
False
question
Factors that influence the rate and depth of breathing include ________.
answer
voluntary cortical control
question
Respiratory control centers are located in the ________.
answer
medulla and pons
question
Which of the following is not a stimulus for breathing?
answer
rising blood pressure
question
What determines the respiratory rhythm in the body?
answer
medullary respiratory centers
question
Why is a patient with tuberculosis often noncompliant with treatment?
answer
Due to the time length of treatment, the patient may stop taking the medication when they start to feel better.
question
Emphysema is distinguished by permanent shrinkage of the alveoli.
answer
False
question
Labored breathing is termed dyspnea.
answer
True