The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

Diffusion is the movement of molecules from

Particle transport that requires input of energy from the cell is

The diffusion of water across a selectively permeable membrane is called

An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes

Once _______________ is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentration on either side of the membrane.

A red blood cell placed in pure water will __________________.

Molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. This process is called ____________________.

How do facilitated diffusion and active transport differ?

A hyper-tonic salt solution has a higher concentration of solutes than a blood cell. What happens when a blood cell is placed in a hyper-tonic salt solution?

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