A nurse is teaching a patient newly diagnosed with Parkinson’s disease about the pathophysiology of the condition. Which of the following explanations best describes the underlying cause of Parkinson's disease?
Inflammation of the motor cortex leads to decreased coordination and balance
Degeneration of dopamine producing neurons in the substantia nigra of the brain leads to motor dysfunction
A loss of acetylcholine in the brain leads to memory problems and cognitive decline.
Excess production of dopamine in the basal ganglia leads to tremors and muscle rigidity.
The Correct Answer is B
A. Inflammation of the motor cortex leads to decreased coordination and balance. Parkinson’s disease is not caused by inflammation in the motor cortex; it primarily involves the loss of dopamine-producing neurons.
B. Degeneration of dopamine-producing neurons in the substantia nigra of the brain leads to motor dysfunction. Parkinson’s disease is caused by the degeneration of dopamine-producing neurons in the substantia nigra, leading to motor symptoms such as tremors, rigidity, and bradykinesia.
C. A loss of acetylcholine in the brain leads to memory problems and cognitive decline. While a loss of acetylcholine is associated with Alzheimer’s disease, it is not the primary issue in Parkinson’s disease.
D. Excess production of dopamine in the basal ganglia leads to tremors and muscle rigidity. In Parkinson’s disease, there is a decrease, not an excess, in dopamine production, which contributes to motor symptoms.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Encourage the client to walk on the injured ankle to promote circulation. Weight-bearing activities should be avoided initially after a Grade II sprain to prevent further injury.
B. Immerse the ankle in warm water immediately after the injury. Ice, rather than warmth, is recommended immediately following an injury to reduce swelling and inflammation.
C. Apply ice to the affected ankle for the first 24-72 hours. Applying ice for 24-72 hours helps reduce swelling and pain by causing vasoconstriction and controlling inflammation in the acute phase.
D. Perform deep tissue massage on the injured area to reduce pain. Massaging a newly sprained ankle can aggravate inflammation and cause additional tissue damage.
Correct Answer is A
Explanation
A. Consume small frequent meals throughout the day. Small, frequent meals reduce the volume of food entering the small intestine at one time, helping to prevent symptoms of dumping syndrome.
B. Lie down immediately after eating to aid digestion. Although lying down after eating can slow gastric emptying and help prevent dumping syndrome, it does not aid in digestion.
C. Include high-carbohydrate foods in every meal. High-carbohydrate foods are likely to worsen symptoms of dumping syndrome by causing rapid glucose absorption, which leads to a spike in insulin and subsequent hypoglycemia.
D. Drink fluids with meals to aid in digestion. Fluids should be taken between meals rather than with meals to avoid rapid gastric emptying and prevent dumping syndrome.
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