Which Is NOT True About the Countercurrent Multiplier System of the Kidney

question 12

Multiple Choice

Which is NOT true about the countercurrent multiplier system of the kidney?

• A) It creates a hyperosmolar medullary interstitium that allows the kidneys to form hypertonic urine.
• B) The descending loop of Henle is permeable to water.
• C) There is active transport of sodium and chloride out of the ascending limb of the loop of Henle.
• D) The ascending loop of Henle is not permeable to water.
• E) The fraction of filtered NaCl reabsorbed from the ascending limb equals the fraction of filtered water reabsorbed from the descending limb.

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Definitions:

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to and removing waste from the fetus through the umbilical cord.

Zygote

The initial cell formed when a new organism is conceived by the union of an egg and a sperm cell, containing genetic information from both parents.

Testosterone

A steroid hormone that plays a key role in the development of male reproductive tissues as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.

Rudimentary Form

The most basic or primitive stage of development.