Why does active transport happen?

Answer 1

Active transport requires energy because you are going against a gradient. Active transportation moving from low to high concentration, while passive transportation such as osmosis and diffusion go from high to low concentration.

One example of passive transportation is a river. Floating downstream does not require any energy. You are simply moving with the gradient. If you wanted to go upstream, you would have to paddle. This requires an input of energy similar to active transport.

Answer 2

active transport happens like across the membrane. the plant cell membrane is highly selective it allows only some molecules to pass through. for others to pass using energy through specialised proteins they are pumped... active transport even takes place against a concentration gradient.

Answer 3

Active transport occurs because it allows cells to move molecules against their concentration gradient, from an area of lower concentration to an area of higher concentration. This process requires energy in the form of ATP to drive the transport proteins that move the molecules across the cell membrane. Active transport is essential for maintaining proper levels of ions and other molecules inside the cell.

Answer 4

Active transport occurs as a way for the cell to get rid of molecules it doesn't need. Active transport is done using energy from the cell.

Answer 5

It is essential in the roots of plants to obtain nutrients.

Answer 6

Fluids flow from High concentrations to Low concentrations whenever possible.

Answer 7

Cell membrane is selectively permeable.Only few can move through it passively.