Assertion: sympathetic nervous system | /r/AtLocation | control
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text: When we are under stress, the fight or flight system is activated and the sympathetic nervous system is in control; digestion is shut down, metabolism, immune function, and the detoxification system is impaired, blood pressure and heart rate are increased, circulation is impaired, sleep is disrupted, memory and cognitive function may be impaired, neurotransmitters are drained, our sense of smell, taste, and sound are amplified, high levels of norepinephrine are released in the brain and the adrenal glands release a variety of hormones like adrenaline and cortisol.