Which of the Following Is a Primary Reason for the Lowered

question 81

Multiple Choice

Which of the following is a primary reason for the lowered brain volume of older adults compared with that of younger adults?

• A) increased growth of dendrites
• B) increased length and complexity of axons
• C) lower numbers of synapses
• D) lower number of neurons

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Definitions:

Elimination Half-life

The time required for the concentration or amount of a substance in the body to be reduced by half its initial value, important in understanding drug metabolism.

Therapeutic Half-life

Describes the duration required for the concentration or effectiveness of a drug in the body to reduce to half of its starting dose in the context of pharmacotherapy.

Distribution Half-life

The time it takes for a drug’s concentration to be reduced by half in the body’s tissues after it has been absorbed into the bloodstream, indicating the drug’s dispersion rate.

Glutamate

An important neurotransmitter in the brain, involved in learning, memory, and the regulation of the nervous system.