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. 2021 Mar 29;8:640974. doi: 10.3389/fmed.2021.640974

Figure 4.

Figure 4

The hypothalamus-pituitary-adrenal (HPA) axis is the major stress mediator system on an intermediate time scale. It is stimulated by catecholamines (representing the fast stress system) and inhibited by thyroid hormones (as slow mediators of stress and allostatic load). In addition, it has multiple antagonists inhibiting partial functions at peripheral levels of the processing structure, some of them (marked by *) resulting from ACE2 activation. AT, angiotensin; STH, somatotropic hormone. For more details see text.