Passive and Active transport Flashcards
Define diffusion
the random movement of particles with a net movement from an area of high concentration to low concentration
Define osmosis
the diffusion of water molecules through a partially permeable membrane
Define net movement
the general direction of movement of particles
True or false: particles always diffuse away from the starting point
False
They move randomly
True or false: living organisms use diffusion to get rid of waste products
True
Partially permeable membrane
Membrane that allows some particles to move through it but not others
How do particles get energy for diffusion
Just the kinetic energy of the particles
Turgor pressure
the force within a cell that pushes the cell membrane against the cell wall
Plasmolysis
The contraction of plant cells when it loses water from being in a hypertonic solution
Flaccid
When cells are soft and contracted due to plasmolysis
Hypertonic soluton
Higher conc of solute
lots of sugar—> hyper
Describe the differentce between active transport and passive transport
Active transport goes against the conc gradient and therefore requires energy
Give two examples of passive transport
Osmosis, diffusion
How is energy supplied for active transport
aerobic respiration in mitochondria
Active transport
the movement of particles against the concentration gradient through a cell membrane using energy from respiration
