A Researcher Has Grown Monolayers of Cells from Either of Two

question 40

Short Answer

A researcher has grown monolayers of cells from either of two epithelial cell lines on a permeable supporting membrane that separates two electrolyte chambers. One of the cell lines (A) has been derived from the mammalian kidney and forms epithelial sheets resembling those lining the renal collecting duct and the urinary bladder. The other (B) is derived from the mammalian small intestine. The researcher has measured the voltage (V) and electrical current (I) across the monolayer and has plotted the results in the graph below. Which line (1 or 2) in the graph do you think corresponds to cell line A? Recall that current (I) is related to the applied voltage (V) by the equation I = V/R, in which R is the electrical resistance. Write down 1 or 2 as your answer.

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Definitions:

Percentage Of Completion

An accounting method that recognizes revenues and expenses of long-term projects as a percentage of the work completed during the period.

Inventory

Goods or materials that a business holds for the ultimate goal of resale, including raw materials, work-in-progress, and finished goods.

Cost

The value of the financial resources expended to acquire or produce a product or service.

Selling Price

The amount of money for which a product or service is offered for sale to consumers.