Of the 33 vertebrae in the spinal column, which is correct?
5 lumbar
12 cervical
7 sacral
5 thoracic
The Correct Answer is A
Choice A reason: The human spinal column has 33 vertebrae: 7 cervical, 12 thoracic, 5 lumbar, 5 sacral (fused), and 4 coccygeal (fused). The 5 lumbar vertebrae, located in the lower back, support significant weight and allow flexibility, making this choice correct for the vertebral count.
Choice B reason: The cervical spine consists of 7 vertebrae, not 12, which are designed for mobility and support of the head. The incorrect count of 12 aligns with the thoracic vertebrae, making this choice scientifically inaccurate for the cervical region.
Choice C reason: The sacral region has 5 vertebrae, which fuse into the sacrum in adults, not 7. The sacrum forms part of the pelvis, providing stability. The incorrect count of 7 corresponds to the cervical vertebrae, making this choice incorrect.
Choice D reason: The thoracic spine comprises 12 vertebrae, not 5, which articulate with the ribs to form the thoracic cage. The incorrect count of 5 aligns with the lumbar or sacral vertebrae, rendering this choice inaccurate for the thoracic region.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Homan sign tests for deep vein thrombosis, not balance. Swaying with eyes closed indicates a positive Romberg sign, so this is incorrect for the documented finding.
Choice B reason: Lack of coordination is vague and not specific to the Romberg test, which assesses proprioception. Positive Romberg sign describes the sway, so this is incorrect for documentation.
Choice C reason: A positive Romberg sign is documented when a patient sways or loses balance with eyes closed, indicating proprioceptive or cerebellar issues. This is the correct term for the finding.
Choice D reason: Ataxia describes general movement, not the specific Romberg test outcome. Swaying in this context is a Romberg sign, so this is incorrect for the nurse’s documentation.
Correct Answer is B
Explanation
Choice A reason: Dorsiflexion and toe fanning indicate a Babinski sign, a reflex test, not Romberg’s sign. Romberg’s sign involves balance issues with closed eyes, so this is incorrect for the neurological assessment.
Choice B reason: A positive Romberg’s sign is observed when a patient sways significantly or loses balance when standing with feet together and eyes closed, indicating impaired proprioception or cerebellar function. This is the correct observation for the test.
Choice C reason: Rhythmic eye twitching (nystagmus) is unrelated to Romberg’s test, which assesses balance. Swaying with closed eyes defines a positive Romberg’s, sign, so this is incorrect for the outcome.
Choice D reason: Inability to point fingers to a reference tests coordination, not the Romberg’s test, which focuses on balance with eyes closed. Significant swaying is the correct sign, so this is incorrect.
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