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Cards In This Set
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MECHANISMS OF WATER REGULATION
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TITLE
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Do all species obtain the water they need in the same way?
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No
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How do humans conserve water?
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You excrete more concentrated urine, decreasing your sweat and other autonomic responses
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How does your posterior pituitary help in conserving water?
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It releases a hormone called vasopressin which raises blood pressure by constricting the blood vessels
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What does this increase in blood pressure caused by vasopressin do?
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The increased pressure helps compensate for the decreased volume
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What is another purpose of Vasopressin?
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Also a antidiuretic hormone(ADH) because it enables kidneys to reabsorb water from urine thus making urine more concentrated
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What will happen if you drink extensivly without eating like many alcoholics?
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You may excrete enough body salts to harm yourself
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How do Gerbils and other desert animals conserve water?
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Gain water from food, excrete dry feces and concentrated urine, they are also unable to sweat
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OSMOTIC THIRST
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TITLE
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What are the two different types of thirst?
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There is Osmotic Thirst and Hypovolemic Thirst
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What does eating salty foods cause?
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Causes Osmotic Thirst
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What does losing fluid, such as bleeding or sweat cause?
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It causes Hypovolemic Thirst
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What is the set point of [ ] of solutes in the mammalian body?
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0.15 M
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What happens if any deviation occurs within this set point?
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The body activates mechanisms which will restore the [ ] of solutes to the set point
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What do the solutes inside and outside a cell produce ?
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They produce Osmotic Pressure
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