Which system shows only a slight decline with age?
Cardiovascular system
Respiratory system
Central nervous system
Renal system
The Correct Answer is C
A. Cardiovascular system
This system undergoes significant changes with aging, such as decreased cardiac output and arterial stiffness.
B. Respiratory system
Experiences notable changes like reduced lung elasticity and vital capacity.
C. Central nervous system
Although neuron loss and slowed synaptic transmission occur, the CNS shows only a slight functional decline unless compounded by disease.
D. Renal system
The kidneys show marked age-related decline, including decreased GFR and reduced ability to concentrate urine.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Slower gastric emptying of fluid
This affects digestion, not necessarily bowel motility or stool formation. It is not the primary factor in constipation.
B. Decreased hydrochloric acid
This may impair digestion but is not directly responsible for constipation.
C. Abdominal bloating
Bloating is more of a symptom than a cause. It may occur after constipation develops.
D. Lack of dietary fiber
Older adults often consume less fiber, which is crucial for stool bulk and regular bowel movements. Low fiber intake is a leading contributor to constipation.
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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