Which of the Following Statements Most Accurately Compares Primary Factors

question 55

Multiple Choice

Which of the following statements most accurately compares primary factors responsible for simple diffusion versus active transport?

• A) Simple diffusion is driven by a concentration gradient, while active transport is driven by ADP.
• B) Simple diffusion is driven by a concentration gradient, while active transport is driven by ATP hydrolysis.
• C) Simple diffusion is driven by ATP hydrolysis, while active transport is driven by an electrochemical gradient.
• D) Simple diffusion is driven transmembrane pumps, while active transport is driven by ATP hydrolysis.

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Definitions:

Melanin Pigment

A natural pigment found in most organisms, responsible for hair, skin, and eye color; provides protection against UV radiation.

Choroid

A layer of blood vessels and connective tissue between the sclera and retina in the eye, providing oxygen and nourishment to the outer layers of the retina.

Pigmented Epithelium

Specialized epithelial cells that contain pigment granules, involved in coloration and protection against sunlight, such as those found in the retina.

Lacrimal Puncta

Small openings on the inner sides of the eyelids that drain tears into the lacrimal ducts.