Net movement of water across a cell membrane occurs

A cell must always expend energy to trasnport substances using

A concentration difference across space is called

Which of the following is a substance that can pass directly through the cell membrane by simple diffusion?

Concentration of solutes inside and outside the cell are equal when the solution is

Diffusion requires

If the molecular concentration of a substance is the same throughout space, the substance

Exocytosis is a

When a cell uses energy to transport a particle through the cell membrane to an area of higher concentration, it is using

Which of the following is NOT a characteristic of active transport?

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