What is the primary purpose of the ciliated mucous membrane in the nose?
To facilitate the movement of air through the nares
To filter coarse particles from inhaled air
To filter out odors
To warm the inhaled air
The Correct Answer is B
A. To facilitate the movement of air through the nares: While the ciliated mucous membrane does help in the overall functioning of the nasal passages, its primary role is not to facilitate air movement but to filter and trap particles.
B. To filter coarse particles from inhaled air: The primary purpose of the ciliated mucous membrane in the nose is to trap and filter out coarse particles, such as dust, pollen, and microbes, from inhaled air. The cilia beat in a coordinated manner to move mucus and trapped particles towards the throat, where they can be swallowed or expelled, helping to keep the airways clear and protect the respiratory system.
C. To filter out odors: While the nasal cavity does play a role in detecting odors through the olfactory receptors located in the upper part of the nasal cavity, the ciliated mucous membrane itself is not primarily responsible for filtering odors.
D. To warm the inhaled air: The nasal passages do help warm inhaled air as it passes through, but this is more a function of the rich blood supply and the large surface area of the nasal cavity rather than the role of the ciliated mucous membrane specifically. The primary action of the ciliated mucous membrane is focused on filtering particles from the air.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Perform a complete cardiac assessment because these signs are probably indicative of early heart failure: While congenital heart disease can present with respiratory distress, the presence of nasal flaring and retractions in an infant with a prolonged upper respiratory infection strongly suggests respiratory distress due to a pulmonary cause, such as bronchiolitis or pneumonia. A cardiac assessment may be necessary, but immediate intervention for respiratory distress is the priority.
B. Have the mother attempt to bottle feed the infant: Infants in respiratory distress often struggle with feeding due to increased work of breathing. Attempting to bottle feed could further compromise oxygenation and increase fatigue, worsening the child's condition.
C. Assure the mother that these signs are normal symptoms of a cold: Nasal flaring and intercostal retractions are signs of increased respiratory effort, indicating significant respiratory distress rather than a mild viral upper respiratory infection. These findings warrant prompt medical evaluation.
D. Recognize that these are serious signs, and contact the physician: Nasal flaring, sternal retractions, and intercostal retractions indicate significant respiratory distress, which can rapidly progress to respiratory failure in infants. Immediate assessment and intervention by a healthcare provider are necessary to ensure appropriate treatment and monitoring.
Correct Answer is D
Explanation
A. Perform the confrontation test: The confrontation test is used to assess peripheral vision rather than overall visual acuity. It is not the standard method for measuring visual acuity in routine physical examinations.
B. Determine the patient's ability to read newsprint at a distance of 12 to 14 inches: While this can be useful for assessing near vision, it does not provide a complete assessment of visual acuity, which includes both near and distance vision.
C. Ask the patient to read the print on a handheld Jaeger card: The Jaeger card is specifically used for assessing near vision. While it is useful for determining how well the patient can see up close, it does not assess distance visual acuity, which is typically required in routine examinations for teenagers.
D. Use the Snellen chart positioned 20 feet away from the patient: The Snellen chart is the standard tool for measuring distance visual acuity. It is positioned 20 feet away from the patient to evaluate how well they can see letters of various sizes. This method provides a clear assessment of the patient’s visual acuity for routine physical examinations.
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