INTRODUCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water removed by the kidneys must be replaced
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Oxygen cannot diffuse into cells if a person is dehydrated
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Water molecules are needed to carry carbon dioxide waste to the kidneys
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None of the above
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Detailed explanation-1: -Losing water through the skin (perspiration) cools the body and helps to maintain homeostatic temperature. Without replacing the lost fluid, however, body temperature will rapidly increase.
Detailed explanation-2: -Because water needs to be kept constant/regulated within very narrow limits. Because optimum conditions are needed for processes within the body and to activate enzyme reactions.
Detailed explanation-3: -Water homeostasis is achieved by regulation of water intake and water loss by the kidneys. The former is achieved by sensations of thirst that motivate water acquisition, whereas the latter is regulated by the antidiuretic action of vasopressin.
Detailed explanation-4: -Lack of a hormone called antidiuretic hormone (ADH) can cause the kidneys to get rid of too much fluid. This results in extreme thirst and dehydration.
Detailed explanation-5: -Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions. It is the maintenance of a constant internal environment despite changes in internal and external conditions. In the human body, these include the control of: blood glucose concentration.