Active Transport and differences Flashcards
What is active transport?
Movement of particles across a cell membrane, against a concentration gradient, using the energy from respiration.
Movement comes in the form of pumps to move the particles the wrong way.
Example of active transport in plants
Absorption of ions into root hair cells.
Examples of active transport in animals
Absorption of small amounts of sugar into villi
How oxygen leaves a leaf
Diffusion
Is passive (no energy required)
Diffusion and osmosis
High to low concentration
Diffusion and osmosis
Involves water only
Osmosis
Involves transport of solutes
Diffusion and active transport
Needs a semi-permeable membrane
Osmosis and active transport
Requires energy
Active transport
How minerals get into root hair cells
Active transport
Against a concentration gradient
Active transport
Key points
Active transport is the energy requiring process of pumping molecules and ions across membranes against a concentration gradient. Active transport helps maintain homeostasis.
