A decrease in dopamine receptors causing increased muscle tone is considered an age-related change of what physiological system?

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Question restatement: A decrease in dopamine receptors causing increased muscle tone is considered an age-related change of what physiological system?

Option 1: body composition. This choice is not appropriate because body composition refers to the proportion of fat, bone, water, and muscle in the body, not to neurotransmitter receptor changes or neuromuscular tone regulation.

Option 2: endocrine. The endocrine system involves glands and hormones regulating bodily functions. While dopamine has hormonal roles in some pathways, the specific description of receptor decreases leading to increased muscle tone aligns more directly with neural signaling mechanisms rather than classic endocrine gland hormone regulation.

Option 3: immune. The immune system deals with defense against pathogens and immune signaling. Dopamine receptor changes affecting muscle tone are not described as immune system alterations, so this option mischaracterizes the physiologic focus.

Option 4: CNS. The central nervous system includes the brain and spinal cord where dopaminergic signaling modulates motor control and muscle tone. A decrease in dopamine receptors leading to increased muscle tone is a neurophysiological change best attributed to CNS processes, reflecting how motor pathways and motor neuron excitability are influenced by dopaminergic activity.

In summarizing, only the CNS option directly corresponds to neural receptor changes impacting motor tone, while the other options describe distinct physiological systems that do not capture this specific neuromuscular consequence.

NUTR4351 14203 - Gerontology and Nutrition Quiz 2 - Chapt 2

A decrease in dopamine receptors causing increased muscle tone is considered an age-related change of what physiological system?

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