Question

What provides the energy for diffusion? Describe one way this process is important within the body. (p. 54)

Short answer

Short Answer: Diffusion is the passive movement of particles from an area of high concentration to an area of lower concentration, powered by the inherent kinetic energy of the particles in motion. An example of diffusion's importance in the human body is the regulation of nutrient and waste exchange between cells and their environment, such as the diffusion of oxygen from the bloodstream into cells and the diffusion of carbon dioxide from cells back into the bloodstream.

Step-by-step solution

Define Diffusion

Diffusion is the passive movement of particles from an area of high concentration to an area of lower concentration until equilibrium is reached. This process occurs in the body and throughout the environment as molecules attempt to equalize their concentration.

Identify the Energy Source for Diffusion

The energy that powers diffusion comes from the inherent kinetic energy of the particles in motion. In other words, particles' natural ability to move and disperse provides the energy required for diffusion to occur, without the need for any external energy input.

Describe an Example of Diffusion's Importance in the Body

One way diffusion is important within the body is in regulating nutrient and waste exchange between cells and their environment. For example, in cellular respiration, oxygen diffuses from the bloodstream into cells, while carbon dioxide, a waste product, diffuses from cells back into the bloodstream. This exchange is vital for cells to obtain the necessary oxygen to produce energy and remove waste products to maintain a healthy environment.