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

Answer and Explanation

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.

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Correct Answer is C

Explanation

A. Bell palsy: Bell palsy is characterized by sudden, unilateral facial weakness or paralysis, usually affecting one side of the face. While it can impact sensation, the inability to differentiate between sharp and dull stimuli on both sides of the face suggests a more systemic issue rather than just Bell palsy.

B. Scleroderma: Scleroderma is a systemic autoimmune disease that affects connective tissue, leading to skin thickening and changes in blood flow. While it can cause skin changes and discomfort, it does not specifically result in the loss of the ability to differentiate sharp and dull sensations in a localized manner.

C. Damage to the trigeminal nerves: The trigeminal nerve (cranial nerve V) is responsible for sensory perception in the face, including the ability to differentiate between sharp and dull sensations. Damage to this nerve can lead to loss of sensation or altered sensation in the facial region. The bilateral nature of the symptoms suggests a central or systemic cause affecting the trigeminal pathways.

D. Frostbite with resultant paresthesia to the cheeks: Frostbite typically causes localized tissue damage and would more likely present with symptoms specific to the affected areas, such as numbness, discoloration, or blistering. While frostbite can lead to sensory changes, it would not typically result in a generalized inability to differentiate sensations on both sides of the face.

A. XI; have patient shrug their shoulders against resistance. B. XI; palpate the anterior and posterior triangles. C. XII; assess for a positive Romberg sign. D. XII; percuss the sternomastoid and submandibular neck muscles.

Correct Answer is A

Explanation

A. XI; have patient shrug their shoulders against resistance: Cranial nerve XI, also known as the accessory nerve, is responsible for the innervation of the sternocleidomastoid and trapezius muscles. Damage to this nerve can lead to weakness in shoulder shrugging and difficulty turning the head. Asking the patient to shrug their shoulders against resistance allows the nurse to assess the function of this nerve effectively.

B. XI; palpate the anterior and posterior triangles: While palpating the anterior and posterior triangles of the neck can provide useful anatomical information, it does not specifically assess the function of cranial nerve XI. This action may not directly address the patient's complaints or evaluate nerve function adequately.

C. XII; assess for a positive Romberg sign: Cranial nerve XII, the hypoglossal nerve, is responsible for tongue movement. The Romberg test assesses balance and proprioception, not directly related to neck and shoulder pain or head movement. This option is not appropriate in this context.

D. XII; percuss the sternomastoid and submandibular neck muscles: Percussion is not a standard method for assessing cranial nerve function and would not provide useful information about nerve damage. This option also incorrectly identifies the relevant cranial nerve, as cranial nerve XII is not involved in neck and shoulder movement.

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What is the primary purpose of the ciliated mucous membrane in the nose?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A patient is unable to differentiate between sharp and dull stimulation to both sides of her face. What does the nurse suspect?

Correct Answer is C

Explanation

A patient comes to the clinic complaining of neck and shoulder pain and is unable to turn her head. Which nerve does the nurse suspect is damaged and how should the nurse proceed with the examination?

Correct Answer is A

Explanation

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