One Substance Has No Membrane Transporters to Move It but Can

question 16

Multiple Choice

One substance has no membrane transporters to move it but can diffuse freely through open leak channels if there is a concentration gradient.Initially,this substance's concentrations in the filtrate and extracellular fluid are equal.Later,however,the active transport of Na⁺ and other solutes creates a gradient by removing water from the lumen of the tubule where it is located.What substance is this?

• A) glucose
• B) calcium
• C) urea
• D) glucose and calcium
• E) glucose, calcium, and urea

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Definitions:

Earnings Per Share

A financial ratio indicating the portion of a company's profit allocated to each outstanding share of common stock, serving as an indicator of the company's profitability.

Net Income

is the profit a company makes after deducting all costs and expenses from its total revenue, including taxes and interest.

Interest Expense

The cost incurred by an entity for borrowed funds, which can include payments on loans, bonds, or lines of credit.

Return on Common Stockholders' Equity

A measure of profitability that indicates how much profit a company generates with the money shareholders have invested.