How Can Urine Contain a Higher Concentration of Wastes (Be

question 57

Multiple Choice

How can urine contain a higher concentration of wastes (be hypertonic) than the blood?

• A)Urine cannot since the process is passive diffusion
• B)Reabsorption of water and salt in the loop of the nephron and collecting ducts leaves behind more concentrated urine
• C)All stages in the kidney involve active transport
• D)Urine can be hypertonic for small molecules if it is hypotonic for an equal number of big molecules
• E)The whole nephron is impermeable to water

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Definitions:

Residual Demand Curve

The demand that remains for a firm's product after accounting for the demand captured by competitors in the market.

Supply Function

The mathematical relationship showing the quantity of a good or service that producers are willing to sell at each possible price.

Market Demand Curve

A graphical representation that shows the quantity of a product that consumers are willing and able to buy at various prices.

Cost Function

Represents the relationship between the cost of producing a good and the quantity produced, highlighting how costs change with changes in production volume.