Praxis 5857 Practice Test Practice Question
The fact that a 75-year-old person generally responds to outside stimuli more slowly than a 45-year-old person is due to the effects of aging on which of the following systems?
Correct Answer: A
Rationale: Aging primarily affects the nervous system, leading to slower response times in older adults due to changes in neural processing and reduced neurotransmitter efficiency. This decline in cognitive and motor functions results in diminished reaction speeds to stimuli.
The endocrine system (B) regulates hormones, which can impact metabolism and energy levels, but does not directly influence response times. The skeletal system (C) deals with bone density and strength, which are not directly related to speed of response. The respiratory system (D) focuses on breathing efficiency and gas exchange, not on the speed of neural responses. Thus, the nervous system is the key factor in age-related response time differences.
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