cells, specialised cells, diffusion, osmosis and active transport revision 04/02/24 Flashcards
What is diffusion
The random passive motion of molecules from a high concentration to a low concentration.
what is osmosis
A passive process where the molecules of a solvent move from a solution of low concentration to a solution of high concentration through a partially permeable membrane.
What is active transport
The movement of molecules or ions across a cell membrane from a region of low concentration to a region of high concentration, against the concentration gradient requiring energy.
what is a specialised cell
A cell designed for a specific purpose or to carry out a particular job, for example red blood cells which are specialised to carry oxygen.
what are the differences between plant and animal cells
cell wall, vacuole, chloroplast
what is the purpose of the vacuole and cell wall in a plant cell
to give the cell structural integrity.
what is the difference between diffusion and osmosis
diffusion is the movement of molecules from high to low concentration while osmosis is the opposite.
what is the difference between diffusion and active transport
Active transport is active while diffusion is passive.
what is active/passive
active uses energy while passive does not
what organelles are in an animal cell
cytoplasm, nucleus, cell membrane, ribosome, mitochondria
what organelles are in plant cells
nucleus, cytoplasm, cell membrane, mitochondria, ribosomes, chloroplasts, vacuole, cell wall
what is the cell wall made of
cellulose
what does the nucleus do
control the cell and holds DNA
what do ribosomes do
make proteins
what does the cytoplasm do
where all chemical reactions happen
