What Is the Approximate Number of Nephrons in an Adult

question 20

Multiple Choice

What is the approximate number of nephrons in an adult kidney?

• A) 1 million
• B) 300,000
• C) 3 million
• D) 100,000

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Definitions:

Isotonic

Describing a solution that has the same osmotic pressure as another solution, leading to no net movement of water across a cell membrane.

Differentially Permeable Membrane

A membrane that selectively allows certain substances to pass through it while keeping others out.

Concentration Difference

The variation in the amount of a substance in two areas, which can lead to diffusion, where substances move from an area of high concentration to one of lower concentration.

Selectively Permeable

Property of the plasma membrane that allows some substances to pass, but prohibits the movement of others.