The student nurse is studying the functioning of the nervous system. Which of the following descriptions of the central nervous system is accurate?

The central nervous system consists of the brain and electrical impulse stimulators.

The central nervous system is made up of the hypothalamus and cerebral nerves.

The central nervous system is made up of the brain and spinal cord.

The central nervous system includes the peripheral and autonomic components.

Answer and Explanation

The Correct Answer is C

A.   This option inaccurately includes "electrical impulse stimulators," which is not a recognized component of the central nervous system. The central nervous system comprises the brain and spinal cord.
B.   The hypothalamus and cerebral nerves are parts of the nervous system but do not represent the entirety of the central nervous system.
C.   The central nervous system consists specifically of the brain and spinal cord, responsible for coordinating and processing sensory information.
D.   The peripheral and autonomic components belong to the broader nervous system but are not part of the central nervous system.

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Correct Answer is C

Explanation

A. Estimating the degree of flexion and extension in each joint primarily assesses the range of motion, not specifically muscle strength.
B. Measuring the degree of force required to overcome joint flexion or extension may assess resistance but doesn't directly evaluate muscle strength.
C. Applying an opposing force when the individual puts a joint in flexion or extension is an accurate method to assess muscle strength, as it evaluates the force the muscle can generate against resistance.
D. Observing muscles for contraction while lifting a heavy object evaluates muscle usage but doesn’t offer a standardized way to assess muscle strength.

A. "With aging, a large amount of subcutaneous fat is lost, which gives the appearance of decreased height." B. "With aging, the spine is not as flexible, which doesn't permit the individual to stand as tall." C. "With aging, the cartilage between the bones in the spine gets worn down, which causes decreased height." D. "With aging, thickening of the intervertebral disks occurs, which causes pressure breakdown of the spinal vertebrae."

Correct Answer is C

Explanation

A. Loss of subcutaneous fat might contribute to changes in appearance but is not primarily responsible for the decrease in height with aging.
B. Reduced spinal flexibility may contribute to posture changes but doesn’t sufficiently explain the decrease in height.
C. With aging, the intervertebral discs and cartilage between spinal bones wear down, leading to a decrease in height due to changes in the spine's structure.
D. Thickening of intervertebral discs is not a typical occurrence with aging and does not explain the decrease in height.

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The student nurse is studying the functioning of the nervous system. Which of the following descriptions of the central nervous system is accurate?

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Naxlex Comprehensive Predictor Exams

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