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What are passive and active transport?

Answer 1

Emma Arvizu

Active transport is based on metabolic energy, while passive transport is based on the physical forces.

Active transport is based on metabolic energy. In the active transport ATPs molecules are used and materials are transported againt the concentration gradients.
While passive transport is based on the physical forces. The metabolic energy is not utilised and materials are transported according to the concentration gradients. Thank You

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Answer 2

Eli Ayoub

Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. It occurs along the concentration gradient from an area of higher concentration to an area of lower concentration. Active transport, on the other hand, requires the cell to expend energy, usually in the form of ATP, to move substances against their concentration gradient, from an area of lower concentration to an area of higher concentration.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.