Chapter 4

2 Simple diffusion requires energy input.

2- False

Plant cells are like red blood cells and can potentially burst when placed in solutions of varying tonicity.

False

What will happen when a red blood cell is placed in distilled water?

Lysis will occur

The movement of water molecules from a region of high free water concentration to a region of low free water concentration is known as ____________________.

Osmosis

Which of the following molecules can diffuse through a cell membrane? Mark all that apply.

Small molecules

What factors determine how fast water moves across a membrane? Select all that apply.

Solute concentration difference and Hydrostatic pressure

What will happen when a red blood cell is placed in a hypertonic solution?

The cell becomes shriveled

Moving molecules against their concentration gradient requires energy.

True

Tonicity is the measure of what?

osmotic pressure

The difference between dialysis tubing and real cell membranes is that

real membranes are more selective