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. 2019 Jan 30;10:38. doi: 10.3389/fphys.2019.00038

FIGURE 1.

FIGURE 1

Circulating regulators of BAT and their origin. Hypothalamus plays an important role in regulating brown fat activity through regulating the sympathetic nervous system activity. Several circulating regulators impact BAT functioning and browning. Many of these act through increasing the sympathetic nervous activity to BAT and WAT, increasing UCP1 expression.