Transport Review

Diffusion is the movement of a substance

• through a lipid bilayer

• only in water

• from an area of low concentration to an area of high concentration

• from an area of high concentration to an area of low concentration

The diffusion of water through a permeable membrane is called

• facilitated diffusion

• active transport

• osmosis

• endocytosis

If the concentration of a sugar solution is lower outside the cell than inside the cell, which of the following will happen by osmosis?

• Water will move out of the cell

• Water will move into the cell

• Sugar will move out of the cell

• Sugar will move into the cell

A solution where the concentration of a sugar solution is lower outside the cell than inside the cell, is a ______________ solution.

• hypotonic

• hypertonic

• isotonic

• exotonic

Which movement of substances through a cell membrane against a concentration gradient requires energy?

• osmosis

• diffusion

• active transport

• facilitated diffusion

In this picture, which way will the water move?

• Water will move into the cell
• Water will move out of the cell
• Water will move in and out of the cell
• Water will not move

A blood cell is placed into the jar, as seen. Where will the water go?

• Into the cell
• Out of the cell
• Equally in & out - it's isotonic
• The water is a lie

Where will the water go?

• Into the cell
• Out of the cell
• Equally in & out - it's isotonic
• There is no water

Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a water solution in which the salt concentration is much higher than the salt concentration in the red blood cells?

• The red blood cells will absorb water and increase in size

• The red blood cells will lose water and decrease in size.

• The red blood cells will first absorb water, then lose water and maintain their normal size.

• The red blood cells will first lose water, then absorb water, and finally double in size.

Which structure is most directly responsible for maintaining homeostasis in all cells?

• chloroplast

• cell membrane

• centriole

• cell wall