Cell Flashcards
Cell
The basic unit of structure and organisation within an organism
Tissue
A group of cells specialised for a particular function
Organ
A group of tissues working together to carry out a particular function
Tissue culture
The growth of cells in a particular sterile medium
Prokaryotic
Don’t have a membrane enclosed nucleus or membrane enclosed cell organelles
Eukaryotic
Have a membrane enclosed nucleus and membrane enclosed cell organelles
Diffusion
The movement of a substance from a region of high concentration density to low concentration density across a concentration gradient
Osmosis
The movement of water molecules across a semi permeable membrane from a region of high water concentration density to low concentration density
Active transport
The movement of a substance from an area of low concentration to an area of high concentration against a concentration gradient. It requires ATP
Turgor
The pressure of the cell contents against the cell wall
Plasmolysis
The shrinkage of a plant cell due to the loss of water by osmosis
Selectively permeable
Only allows some materials to pass through cells membranes
Ultra structure
The detail of a structure as seen using an electron microscope
Interphase
The phase in the cell cycle when the cell is not diving
Chromatin
Name given to a chromosome when they are elongated and not dividing
