Which age-related changes decrease in older people? Select all that apply.
Intellectual capability
Tolerance for extremes in temperature
Total body water
Force of pulse
Pulmonary gas exchange
Conduction speed of CNS impulses
Correct Answer : B,C,D,E,F
A. Intellectual capability: Intellectual ability generally remains intact with age, unless affected by disease such as dementia.
B. Tolerance for extremes in temperature: Decreases due to impaired thermoregulation and thinner skin.
C. Total body water: Decreases, making older adults more susceptible to dehydration and electrolyte imbalances.
D. Force of pulse: May decrease due to decreased cardiac output and vascular elasticity.
E. Pulmonary gas exchange: Decreases due to changes in alveolar surface area and chest wall compliance.
F. Conduction speed of CNS impulses: Decreases, leading to slower reaction times and reflexes.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Alzheimer dementia
MCI is a known risk factor and often a prodromal stage for Alzheimer's disease; many people with MCI progress to Alzheimer's.
B. Dementia, non-Alzheimer type
While possible, the most common progression is to Alzheimer’s, not other forms of dementia.
C. Psychotic disorders
MCI is primarily cognitive and does not typically progress to psychotic disorders.
D. Parkinson disease
MCI is not a precursor to Parkinson's disease, which is a neurodegenerative motor disorder.
Correct Answer is ["A","B","C"]
Explanation
A. Decreased resting cardiac output
Cardiac output decreases due to reduced myocardial efficiency and heart muscle compliance.
B. Increased risk for heart attack
Atherosclerosis and vascular stiffness raise the risk of myocardial infarction.
C. Increased blood pressure
Arterial stiffness and decreased elasticity lead to increased systolic blood pressure.
D. Increased coronary blood flow
Blood flow may actually decrease due to narrowing of coronary arteries.
E. Decreased rigidity of the heart
Aging causes the heart muscle to increase in rigidity (i.e., become stiffer), not decrease.
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