Transport across cell membranes Flashcards
what dose cell membrane do?
The structure that controls movement of molecules into and out of a cell .
what dose the phospholipids do?
Molecules that make up the cell membrane with proteins.
what dose the selectively permeable do?
allows some molecules through but not others.
what dose passive transport do?
movement of molecules that dose not require energy.
what dose concentration gradient do?
when there is a difference in concentration on each side of a cell membrane.
what dose diffusion do ?
The movement of molecules from higher concentration to lower concentration,down a concentration gradient.
what dose osmosis do?
The movement of water from higher water concentration to lower water concentration , through a selectively permeable membrane.
what dose turgid do?
A plant cell that has filled up with water.
what dose plasmolysed do?
A plant cell that has shrunk as water moved out of it .
what dose active transport do ?
The movement of molecules and ions against the concentration gradient that requires energy.
what dose animal cell do when you placed in a salty/ sugary solution ?
it shrinks because water moves out of the cell by osmosis.
what dose animal cell do when placed in pure water?
bursts because water moves into the cell by osmosis.
what dose plant cell do when placed in a salty/sugary solution?
it plasmolysed because water moves out of the cell by osmosis.
what dose plant cell do when it placed in pure water?
turgid because water moves into the cell by osmosis .
