Water Movement Is Important in Urine Formation in the Kidneys

question 81

Multiple Choice

Water movement is important in urine formation in the kidneys. Urine is formed when the blood is filtered by the kidneys into kidney tubules. Three figures are presented here that relate to how the kidney tubules respond to the administration of the hormone vasopressin. The direction that water flows in these figures is from the kidney tubules back into the blood.
Figure A. Changes in permeability of tubules in the kidney in response to the hormone vasopressin (AVP) , which aids in osmoregulation.
Figure B. Density of aquaporins in kidney tubule cells before, during, and after administration of vasopressin.
Figure C. Permeability of tissues to water before, during, and after administration of vasopressin.
-How do the data in Figure A relate to the data in Figures B and C?

• A) Figure B shows the method used to obtain the data in Figure A.
• B) Figure C is essentially a summary of the data in Figure A.
• C) Figure A is about water movement, and Figures B and C are about presence of aquaporins.
• D) Figure A has data for more than 2 hours, and Figures B and C show data all collected at the same time.

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Definitions:

Declining-Balance Depreciation

A method of accelerated depreciation where an asset loses value by a fixed rate, resulting in larger depreciation charges in the earlier years and smaller charges in the later years.

Depreciation Expense

The allocation of the cost of a tangible asset over its useful life, representing how much of an asset's value has been used up over a period.

Depreciation Rate

The percentage rate at which an asset is depreciated across its useful life, impacting how much of its cost is allocated as an expense each year.

Accelerated Depreciation

A method of depreciation in which an asset loses book value at a faster rate than the traditional straight-line method.