How does the concentration gradient influence diffusion?

How does the concentration gradient influence diffusion?

• A. A steeper concentration gradient decreases the rate of diffusion
• B. A steeper concentration gradient has no effect on diffusion
• C. A steeper concentration gradient increases the rate of diffusion
• D. A steeper concentration gradient only affects large molecules

Answer: (C)

A steeper concentration gradient increases the rate of diffusion because diffusion is driven by the movement of particles from an area of higher concentration to an area of lower concentration. When the difference in concentration between two regions is greater, the rate at which particles move to equalize that difference increases. This is due to the fact that there are more particles in the higher concentration area that can spontaneously move to the lower concentration area, which enhances the overall diffusion process. In a practical context, consider how gases exchange in the lungs. Oxygen diffuses from the alveoli, where it is at a higher concentration, into the bloodstream where it is at a lower concentration. If the difference in concentration (the gradient) is large, oxygen will diffuse into the blood more rapidly. Thus, the concentration gradient is a crucial factor in determining the rate of diffusion.

A steeper concentration gradient increases the rate of diffusion because diffusion is driven by the movement of particles from an area of higher concentration to an area of lower concentration. When the difference in concentration between two regions is greater, the rate at which particles move to equalize that difference increases. This is due to the fact that there are more particles in the higher concentration area that can spontaneously move to the lower concentration area, which enhances the overall diffusion process.

In a practical context, consider how gases exchange in the lungs. Oxygen diffuses from the alveoli, where it is at a higher concentration, into the bloodstream where it is at a lower concentration. If the difference in concentration (the gradient) is large, oxygen will diffuse into the blood more rapidly. Thus, the concentration gradient is a crucial factor in determining the rate of diffusion.