Cellular Transport

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

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

Net movement of water across a cell membrane occurs

Diffusion requires

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

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

A cell must always expend energy to trasnport substances using