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. .
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
The posterior tibial pulse is located in the groove between the medial malleolus (inner ankle bone) and the Achilles tendon. Palpating this pulse requires a gentle but firm touch to identify the arterial pulsations. It is a common site for assessing peripheral circulation and is essential for evaluating lower extremity perfusion.
Choice B rationale
The inguinal area is the anatomical region of the groin, where the femoral pulse is located. The femoral pulse is palpable just below the inguinal ligament, midway between the anterior superior iliac spine and the pubic symphysis. This is a central pulse site, distinct from the posterior tibial pulse.
Choice C rationale
The top of the foot is where the dorsalis pedis pulse is located. This pulse is found lateral to the extensor hallucis longus tendon, over the metatarsal bones. It is another important site for assessing lower extremity perfusion but is different from the posterior tibial pulse.
Choice D rationale
Behind the knee is the location for palpating the popliteal pulse. This pulse is more difficult to assess due to its deep location within the popliteal fossa. It requires the patient's knee to be slightly flexed to relax the muscles and facilitate palpation.
Correct Answer is ["2"]
Explanation
Step 1 is convert grams to milligrams. 1 g = 1000 mg.
Step 2 is calculate how many milliliters will the nurse administer. 800 mg ÷ (1000 mg ÷ 2.5 mL) = 800 mg ÷ 400 mg/mL = 2 mL.
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