Mice’s reactions to stressful situations seem to be strongly influenced by their sex. Females are __31__ suffer from long-term stress disorders more often. The males, by contrast, show a greater ability to __32__ normal state after a period of high stress. The difference has to do with a stress hormone called CRF. This chemical causes elevated attention, __33__ the mouse __33__ danger. When the danger has passed, the brain no longer needs it. In male mice, the brain returns to its normal equilibrium relatively quickly, and the mice then calm down. __34__, female mice remain stressed for longer. Continued and excessive exposure to CRF causes long-term problems for the mouse, including mood disorders. It isn’t known whether the same process happens in humans. But it might explain why women are affected by mood disorders __35__ a higher rate than men. 32.

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