Your Body Constitutes a System of Organized Units Controlling Your

question 44

Multiple Choice

Your body constitutes a system of organized units controlling your internal environment,such as the concentration of Na⁺ in your blood.If this concentration falls below normal,you would have hyponatremia,a condition that can cause headaches,mental confusion,and even seizures.Which event would most likely cause hyponatremia?

• A) Gut cells absorbing too much Na⁺ from food
• B) Kidney cells absorbing too much Na⁺ from urine
• C) Sweating profusely,followed by drinking large quantities of water
• D) Producing increased amounts of urine after drinking several cups of coffee
• E) Kidney cells excreting Na⁺ into the urine

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Definitions:

Fixed Costs

Costs that do not change with the level of production or sales, such as rent or salaries.

Average Total Costs

The total expenses incurred in the process of producing or offering a good or service, divided by the quantity of goods or services produced or offered.

Average Variable Costs

The sum of all variable production costs divided by the total number of units produced.

Output

The amount of something produced by a person, machine, or industry.