Homeostasis is when organisms regulate their internal conditions to
adjust to the changing environment. The hamster in this picture is
demonstrating homeostasis by drinking water. There are many reasons why we
humans and animals need to drink water to adjust to our surroundings. For
example, after the hamster runs on the wheel, it will get very sweaty and excrete
salt and water. To maintain the right water level for its body, it needs to
drink water to refill the amount lost. The amount lost has to balance with the
amount taken. The results are bad if our bodies have too much or too little
water. Another reason to drink water to maintain homeostasis is our sodium
level. For example, if the hamster ate something that was high in sodium, its
body will demand water because the sodium level has exceeded normal standards.
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