A similarity between the nervous system and the hormone secreting system in humans is that they both <span>help to maintain homeostasis.
Homeostasis is <span>the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.</span>
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I just translated this question, but I'll be giving you English answer so just translate it as well in your language.
In a residence with no basement, a dorm, or an apartment: Avoid windows. Go to the lowest floor, small core room (like a bathroom or closet), beneath a stairwell, or in an indoors hallway with no windows. Crouch as low as feasible to the floor, going through down; and cover your head with your hands.
Reason*
waters from natural sources contain minerals. these minerals can either be basic or acidic, thus changing the pH of water accordingly.