Transport across membranes Flashcards
1
Q
What is osmosis
A
The movement of water molecules from an area of higher water concentration to an area of a lower water concentration
2
Q
What does osmosis move through?
A
A selectively permeable membrane
3
Q
Effects through osmosis on animal cells if placed in pure water?
A
It could turn turgid or shrink
4
Q
What is diffusion?
A
Molecules move down a concentration from a higher to a lower concentration down a concentration gradient
5
Q
What is active transport?
A
Process by which molecules enter or leave a cell against a concentration gradient which requires energy
6
Q
What term is used to describe a structure that allows rapid passage through it of all molecules in a solution?
A
freely permeable eg cell wall
