What's the difference?
Compare and contrast active and passive transport
Active transport happens when a cell uses energy to transport individual molecules across the cell membrane. Sometimes, proteins have to work against the concentration gradient. The membrane proteins are constantly pumping ions in and out to get the membrane of the neuron ready to transmit electrical impulses.
In passive transport, ions and molecules move along a concentration gradient. Which is movement from a high concentration, to a low concentration. This process does not require chemical energy.
How are they alike?
Both active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products.