Which of the Following Statements Regarding the Structure and Function

question 34

Multiple Choice

Which of the following statements regarding the structure and function of cell membranes is correct?

• A)The phospholipid bilayer is arranged so that the hydrophilic heads of the phospholipid molecule face the extra- and intracellular fluids.
• B)Some proteins integrated into the membrane serve as channels for the passage of nonpolar molecules through the membrane.
• C)Peripheral membrane proteins function as channels associated with transport of ions through the membrane.
• D)Cholesterol molecules function to transport ions from one side of the plasma membrane to the other.
• E)The plasma membrane is a layer of phospholipid molecules with their hyrophilic head groups in contact with the extracellular solution and the hydrophobic tail groups in contact with the intracellular solution.

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Definitions:

Total Consumer Surplus

The total benefit received by consumers in a market transaction, measured as the difference between what consumers are willing to pay and what they actually pay.

Price Ceiling

A government-imposed limit on how high the price of a good or service can be charged, usually intended to protect consumers.

Consumer Surplus

The difference between what consumers are willing to pay for a good or service and what they actually pay.

Producer Surplus

The difference between what producers are willing to accept for a good or service versus what they actually receive, typically illustrated as the area above the supply curve and below the market price.