Final answer:
Three main passive transport types in the human body are diffusion, osmosis, and facilitated diffusion, all of which involve the movement of molecules or ions across cell membranes without the need for cellular energy.
Explanation:
Three types of passive transport that occur in our body are diffusion, osmosis, and facilitated diffusion.
Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.
Osmosis, a specific type of diffusion for water, is the movement of water through a semi-permeable membrane from a dilute solution toward a more concentrated one.
Facilitated diffusion uses carrier or channel proteins to move substances across the cell membrane from an area of higher concentration to one of lower concentration without the use of energy.
Use the example of DDT to explain how a pesticide can bioamplify and damage entire ecosystems