Which is a cause of presbycusis in older people?
Changes in the lens
Hardening of the outer ear canal
Atrophic changes in the cochlea
Ototoxicity from medications
The Correct Answer is C
A. Changes in the lens
Related to vision changes (e.g., presbyopia), not hearing.
B. Hardening of the outer ear canal
Can cause conductive hearing loss, but presbycusis is sensorineural in nature.
C. Atrophic changes in the cochlea
Presbycusis is due to degeneration of the cochlea and auditory nerve, a normal age-related change.
D. Ototoxicity from medications
This causes pathologic hearing loss, not the gradual, age-related loss seen in presbycusis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is ["B","C","D","E","F"]
Explanation
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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