Diffusion Is the

question 59

Multiple Choice

Diffusion is the

• A) random movement of the particles of a substance from a region of lower concentration to a region of higher concentration.
• B) only means by which respiratory gases are exchanged between the respiratory medium (air or water) and the internal body fluids of an animal.
• C) active movement of the particles of a substance to a region of higher concentration.
• D) active movement of a substance to a region of lower concentration with help from a protein.
• E) mechanism by which carbon dioxide moves from an area of low concentration to an area of higher concentration.