Active Transport
Against the concentration gradient
Peeling an orange
What is an example of diffusion?
An egg shrinks
What does an egg do when soaked in a hypertonic solution?
Dilute
What is a solution with a low concentration of solutes?
Protective barrier around the outside of a cell
What is the definition of a cell membrane?
Exocytosis
What is the cell's process of sending materials OUT of the cell wrapped in a layer of cell membrane?
Diffusion
What is it called when particles spread out from high concentration to low without using any energy?
An egg swells
What does an egg do when soaked in a hypotonic solution?
Concentrated
What is a solution with a high concentration of solutes?
Selectively permeable
How does the cell membrane control what materials can and cannot pass through?
Endocytosis
What is the cell's process of bringing materials INTO the cell wrapped in a layer of cell membrane?
Osmosis
What is a special type of diffusion in which water molecules travel in or out through the cell membrane?
An egg stays the same
What does an egg do when soaked in an isotonic solution?
Hypotonic
What is a concentration of solutes LESS than what is in the cell?
Two molecules
What is the thickness of the cell membrane?
ATP
What is the energy molecule / source of energy that cells use for active transport?
Like coasting downhill on a bicycle
Why doesn't it require any energy to move particles from high concentration to low? (OR: Why can particles move with the concentration gradient?)
One single cell
What is an egg?
Isotonic
What is a concentration of solutes the SAME as what's in a cell?
Phospholipid bilayer
What material is a cell membrane made out of?
Sodium-potassium pump
What is an example of how a cell uses specialized transport proteins to move materials in or out of the cell AGAINST the concentration gradient?
Feeling thirsty after eating salty food
What is an example of a cell's response to osmosis?
Water
What is the substance that moves in or out through the egg's membrane due to osmosis?
Hypertonic
What is a concentration of solutes MORE than what is in a cell?
Transport proteins
What are specialized molecules embedded in the cell membrane that actively bring large molecules in or out?