Which condition is NOT a cause of atrophy?

Atrophy refers to the decrease in the size of cells, tissues, or organs, often resulting from a reduction in workload, loss of innervation, diminished blood supply, inadequate nutrition, or loss of hormonal support. In this context, "increased nutrition" does not contribute to atrophy; rather, it typically promotes growth and maintenance of tissues.

When nutrition is increased, cells receive more substrates and energy, which can enhance their function and size. This is particularly true in muscle cells, where better nutrition can lead to hypertrophy or maintenance of muscle mass, opposed to atrophy. Therefore, when considering the options listed, increased nutrition stands out as a condition that would not cause atrophy but rather support cellular health and growth.

The other options, denervation, endocrine stimulation, and ischemia, are all associated with processes that lead to atrophy. Denervation leads to muscle wasting due to the lack of neural input; endocrine stimulation can involve hormonal imbalances that may result in tissue loss; and ischemia, or reduced blood flow, can lead to insufficient oxygen and nutrients, contributing to cell shrinkage and atrophy.