Which pathophysiologic change is found in the brain tissue of people who have Alzheimer's disease?
Decreased dopamine
Increased glial cells
Increased glutamate
Neurofibrillary tangles
The Correct Answer is D
A. Dopamine is primarily associated with other neurodegenerative disorders such as Parkinson's disease, not Alzheimer's disease. In Alzheimer's disease, the focus is on changes related to beta-amyloid plaques and neurofibrillary tangles rather than alterations in dopamine levels.
B. Glial cells, including astrocytes and microglia, play a role in the brain's immune response and support of neurons. In Alzheimer's disease, there is evidence of increased activation and proliferation of glial cells in response to neuroinflammation and the presence of beta-amyloid plaques and neurofibrillary tangles. This reactive gliosis is a secondary response to the underlying pathology.
C. Glutamate is an excitatory neurotransmitter involved in various brain functions, including memory and learning. In Alzheimer's disease, there is evidence of dysregulation in glutamate metabolism and
signaling pathways. This dysregulation can lead to excitotoxicity, which contributes to neuronal damage and cell death seen in the disease.
D. Neurofibrillary tangles are one of the hallmark pathological features of Alzheimer's disease. These tangles are aggregates of hyperphosphorylated tau protein that accumulate inside neurons, disrupting their normal functioning and eventually leading to cell death. Neurofibrillary tangles, along with beta- amyloid plaques, contribute to the progressive cognitive decline observed in Alzheimer's disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
desired dose / available dose) x available volume.
The desired dose is 250 mg, and the available dose is 1000 mg in 8 mL.
So, the calculation is (250 mg / 1000 mg) x 8 mL, which equals 2 mL. Therefore, the nurse should administer 2 mL of hydrocortisone sodium succinate.
Correct Answer is C
Explanation
A. Involves the use of physical force that may result in bodily injury, pain, or impairment. This option does not fit the scenario described because it does not involve direct physical harm.
B. Involves behaviors such as intimidation, threats, humiliation, and isolation that cause mental or emotional distress. While similar to neglect in some aspects, neglect specifically refers to the failure to provide essential care rather than actively causing psychological harm.
C. Neglect refers to the failure of a caregiver or responsible person to provide the necessary care, assistance, or supervision that is essential to maintain the health and well-being of an elderly person.
D. Involves unauthorized or improper use of an elderly person's financial resources. This option does not apply to the scenario described as it involves financial exploitation rather than the physical or emotional neglect of the resident.
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