All of the following can normally be present in the aging adult, EXCEPT
a. decreased memory, especially short-term memory.
b. increased visual acuity.
c. diminished amounts of neurotransmitters.
d. diminished total brain weight.
B
With aging, visual acuity is decreased, not increased. There is a slight decline in short-term memory in the aging adult. Additionally, the amount of neurotransmitters produced in the neuron is diminished, and the activity of the enzymes that degrade the neurotransmitter increases. Thus, there is a diminished amount of neurotransmitters. The total brain weight, the number of synapses, and the number of neurons diminish with aging, beginning at age 50.
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