A nurse is assisting with teaching a group of nursing students about the pathophysiology of the spinal cord. Which of the following statements by a nursing student indicates understanding?
"The ascending tract of the spinal cord processes information in the brain."
"The descending tracts of the spinal cord deliver the CNS motor information to neurons in the muscle."
"The sensory receptors are in the muscles."
"The motor neurons are in the dermal layer of skin."
The Correct Answer is B
A. The ascending tract of the spinal cord transmits sensory information to the brain, but it does not process it; processing occurs in the brain itself.
B. This statement accurately describes the function of the descending tracts, which carry motor commands from the central nervous system (CNS) to the muscles, facilitating movement.
C. Sensory receptors are located in various tissues throughout the body, including the skin, not just in the muscles.
D. Motor neurons are not found in the dermal layer; they are located in the spinal cord and the peripheral nervous system, where they innervate muscles.
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Related Questions
Correct Answer is B
Explanation
A. The ascending tracts transmit sensory information to the brain, but they do not process the information; that function is performed in the brain itself.
B. This statement accurately reflects the function of the descending tracts, which carry motor signals from the CNS to the muscles, facilitating voluntary movement.
C. Sensory receptors are located in various tissues throughout the body, including the skin and muscles, but not exclusively in the muscles.
D. Motor neurons are located in the spinal cord and peripheral nervous system, not in the dermal layer of the skin, where sensory receptors reside.
Correct Answer is C
Explanation
A. Wearing low-heeled shoes is advisable to promote better posture and alignment, so this statement is appropriate.
B. Carrying heavy objects close to the body is a recommended practice for preventing back injury, indicating correct understanding.
C. Sitting with knees lower than hips can lead to poor posture and increased strain on the lower back, indicating a need for further clarification. The correct position should have the knees level or slightly higher than the hips.
D. Strengthening abdominal muscles is beneficial for back support and injury prevention, indicating the client understands the concept.
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