What Does the Countercurrent Mechanism Accomplish in the Nephron Loop

question 2

Multiple Choice

What does the countercurrent mechanism accomplish in the nephron loop?

• A)secretion of water and electrolytes into the filtrate
• B)production of very dilute urine
• C)constriction of the arterioles to increase blood pressure
• D)creation of a steep concentration gradient for continued water reabsorption

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Definitions:

Exposed Rock

Areas where bedrock is visible at the Earth’s surface, not covered by soil, vegetation, or water.

Chemical Weathering

The breakdown of rocks and minerals by chemical reactions with the environment, leading to alteration or decomposition.

Physical Weathering

The breakdown of rocks and minerals into smaller pieces by physical forces without changing their chemical composition.

Debris Flow

A moving mass of loose mud, sand, soil, rock, and water that travels down a slope under the influence of gravity.