Which statement is TRUE about how air enters the lungs?
When the air diffuses through the lung tissue, the adjoining air replaces the diffused air in the lungs.
The pressure of the air in the bronchus blows open the bronchioles causing air to move into the lungs.
When the lungs expand, the pressure inside the lungs becomes negative compared to the atmospheric pressure causing air to enter the lung
The muscles of the diaphragm contract causing a sympathetic constriction of the lungs and resultant movement of air.
The Correct Answer is C
This is how Inhalation Works:
Inhalation is the process of drawing air into the lungs. Here's a step-by-step explanation:
Diaphragm and Intercostal Muscle Contraction:
The diaphragm (a dome-shaped muscle located at the base of the lungs) contracts and moves downward.
The intercostal muscles (muscles between the ribs) contract, pulling the ribcage upward and outward.
Expansion of the Thoracic Cavity:
The contraction of these muscles increases the volume of the thoracic cavity (the chest area).
As the thoracic cavity expands, the pleural cavity (the space between the lung and chest wall) also expands.
Creation of Negative Pressure:
The expansion of the thoracic cavity reduces the pressure within the lungs.
This pressure is now lower than the atmospheric pressure (pressure of the air outside the body).
Air Flow into the Lungs:
Due to the negative pressure, air flows from the higher atmospheric pressure outside the body into the lower pressure inside the lungs.
Air travels through the trachea (windpipe), into the bronchi (two main air passages into the lungs), and finally into the alveoli (tiny air sacs where gas exchange occurs).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The exchange of gases in the lungs occurs in the alveoli. These tiny air sacs are where oxygen is transferred from the air into the blood and carbon dioxide is transferred from the blood to the air to be exhaled.
Correct Answer is ["B","C","D"]
Explanation
Choice A reason:
Canceling Netflix by Internet service is not relevant to Mr. Jones’ discharge planning. While managing finances and subscriptions may be part of overall life management, it does not address the immediate safety and mental health needs of Mr. Jones.
Choice B reason:
Releasing information signed for family to secure Mr. Jones’ loaded gun or having the police secure the gun if needed prior to discharge is crucial for ensuring his safety. Removing access to firearms reduces the risk of self-harm and is an important step in discharge planning for someone with suicidal ideation.
Choice C reason:
Obtaining a psychiatric provider follow-up appointment as soon as possible and evaluating for PHP (Partial Hospitalization Program) or residential treatment with the treatment team is essential. Continuity of care and appropriate follow-up are critical for managing Mr. Jones’ depression and preventing relapse.
Choice D reason:
Assisting in developing a safety plan prior to discharge that is written with phone numbers and interventions is vital. A safety plan provides Mr. Jones with clear steps to take if he feels at risk of harming himself, including contact information for crisis services and supportive individuals.
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