The six (6) eye muscles that control eye movement are innervated by cranial nerves:

I, II, V.

III, IV, VI.

III, V, XI.

II, V, VI. .

Answer and Explanation

The Correct Answer is B

Choice A rationale

Cranial nerve I (olfactory) is responsible for smell, and cranial nerve II (optic) is responsible for vision. Cranial nerve V (trigeminal) is involved in facial sensation and mastication. These nerves are not primarily involved in controlling the extrinsic eye muscles responsible for eye movement.

Choice B rationale

Cranial nerve III (oculomotor) innervates the superior, inferior, and medial recti, and the inferior oblique muscles, and controls eyelid elevation. Cranial nerve IV (trochlear) innervates the superior oblique muscle. Cranial nerve VI (abducens) innervates the lateral rectus muscle. Together, these three cranial nerves precisely coordinate all six extraocular muscles for conjugate gaze.

Choice C rationale

While cranial nerve III (oculomotor) is correctly identified, cranial nerve V (trigeminal) and cranial nerve XI (accessory) are not primarily involved in eye movement. Cranial nerve V is involved in facial sensation and mastication, and cranial nerve XI innervates the sternocleidomastoid and trapezius muscles for head and shoulder movement.

Choice D rationale

Cranial nerve II (optic) is responsible for vision, transmitting visual information from the retina to the brain. Cranial nerve V (trigeminal) is involved in facial sensation and chewing. Cranial nerve VI (abducens) is correctly identified as innervating the lateral rectus, but the other two nerves listed do not control the majority of eye movements.

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Free Nursing Study Resources

Correct Answer is ["35"]

Explanation

Step 1 is to calculate the total drops to be infused. 100 mL × 15 gtt/mL = 1500 gtt.

Step 2 is to calculate the flow rate in drops per minute. 1500 gtt ÷ 30 minutes = 50 gtt/min. The final calculated answer is 50 gtt/min

A. Ask the patient to say "ahh" & watch for movement of the soft palate & uvula. B. Have the patient stick out the tongue and observe for tremors or pulling to one side. C. Use a wisp of cotton to brush over the eyelashes and observe for blinking. D. With eyes closed, touch various areas on the face with a wisp of cotton and have patient identify where touched.

Correct Answer is A

Explanation

Choice A rationale

Cranial nerve X, the vagus nerve, plays a crucial role in innervating the pharynx and larynx, influencing speech and swallowing. Observing the movement of the soft palate and uvula when the patient says "ahh" assesses the motor function of the vagus nerve, as its bilateral innervation is essential for the symmetrical elevation of these structures.

Choice B rationale

Having the patient stick out the tongue and observing for tremors or pulling to one side assesses the function of cranial nerve XII, the hypoglossal nerve. This nerve controls the intrinsic and extrinsic muscles of the tongue, and abnormalities can indicate nerve damage or neurological issues affecting tongue movement.

Choice C rationale

Using a wisp of cotton to brush over the eyelashes and observing for blinking assesses the corneal reflex, which involves both cranial nerve V (trigeminal, sensory) and cranial nerve VII (facial, motor). This test evaluates the integrity of the reflex arc rather than solely cranial nerve X.

Choice D rationale

With eyes closed, touching various areas on the face with a wisp of cotton and having the patient identify where touched assesses the sensory function of cranial nerve V, the trigeminal nerve. This nerve is responsible for transmitting touch, pain, and temperature sensations from the face.

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The six (6) eye muscles that control eye movement are innervated by cranial nerves:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The physician orders Kefzol 2 g in 100 mL of NS IVPB to infuse over 30 minutes. Tubing drop factor is 15 gtt/mL. Calculate the flow rate in drops per minute. (ROUND TO WHOLE NUMBER: LABEL CORRECTLY TO RECEIVE CREDIT)

Correct Answer is ["35"]

Explanation

Which of these statements best describes how the nurse should assess the function of cranial nerve X?

Correct Answer is A

Explanation

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Before delivering a drug through an enteral tube, it is most important for the nurse to do which of the following FIRST?

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A nurse administering medications through a tube must remember which of the following?

Order: 1.5 L of 0.9 % NS over 20 hours. Calculate milliliters per hour. (ROUND TO WHOLE NUMBER & LABEL CORRECTLY TO RECEIVE CREDIT)