Chapter 8 Lesson 3 - Obtaining and Removing Materials in Cells
Terms in this set (11)
Condition in which an organism's (or cell's) internal (inside) environment is kept stable in spite of changes in the external (outside) environment.
The process by which molecules move from areas of HIGH concentration to LOW concentration
A special type of diffusion where WATER molecules move across a selectively permeable membrane
Selectively Permeable (Semi-Permeable)
allow some substances to pass through but not others
the movement of materials across a cell membrane using cellular ENERGY
the movement of materials across a cell membrane WITHOUT USING CELLULAR ENERGY
when the concentration of the materials is EQUAL or BALANCED
The constant, random, MOVEMENT of molecules
What causes diffusion?
When the concentration reaches equilibrium
When does diffusion stop?
Active and Passive Transport
What processes do cells use to maintain homeostasis?
It is easier to use diffusion because it doesn't require energy
Why don't cells use active transport all the time?
OTHER SETS BY THIS CREATOR
Weathering, Erosion, and Deposition
Topic 3 Lesson 1: Earth's Spheres
Nature of Science Vocabulary