Transport across cell membrane Flashcards
plasmolysed is when a cell…….
has a vacuole that has shrunk due to water loss,causes the cell membrane to pull away from the cell
plant cell placed in a solution with a lower water concentration then that inside the cell will……
take up the water by osmosis and become turgid
an animal cell placed in a solution with a water concentration higher then the inside the cell will…..
take up water by osmosis and could burst
osmosis is the movement of water molecules from a region of……
high water concentration ro a region of lower water concentration through a selectively permeable membrane
some substances that enter cells by diffusion are……
oxygen glucose amino acids
some substance that leaves cells by diffusion are……..
carbon dioxide and urea
passive transport is the movement of molecules……
from a high concentration against a concentration gradient
diffusion is the movement of substance from a……
high concentration gradient to a lower concentration down a concentration gradient
the difference in concentration of a substance is a…..
concentration gradient
passive transport of a substance does not ……..
require additional energy
the cell membrane is……
selectively permeable
the cell membrane is composed off…..
lipid and protien
