Cell Transport and Plasma Membrane

The process where only water is allowed to pass through the cell membrane from a high to low concentration.

• meiosis

• respiration

• diffusion

• osmosis

After examining this diagram showing the concentration of water inside and outside of the cell, identify the tonicity of the solution.

• hypertonic

• hypotonic

• isotonic

Which statement best describes the cell membrane?

• The protective outer layer that controls what enters and leaves the cell.
  

• Stores information on DNA molecules / Directs and controls the activities of the cell.
  

• A folded membrane that moves materials around inside cells / Also acts as the site of manufacturing materials needed by the cell.
  

• The smallest organelle with a huge job / Makes proteins, which are the building blocks of the body.
  

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.

What is the name of the structure at the end of the black line?

• cell-surface marker

• transport or channel protein

• enzyme

• receptor protein

Which type of transport does not require energy?

• Passive Transport

• Active Transport

• Diffusion

• Osmosis

What are two types of passive transport?

• endo and exocytosis 

• in a minute and later

• hydrophobic and hydrophillic 

• osmosis and diffusion

Proteins and polysaccharides that are too large to move into a cell through diffusion or active transport move into cell by

• exocytosis

• endocytosis

• the sodium-potassium pump

• channel proteins

What do the brown structures represent?

• Phospholipids

• Cholesterol Proteins

• Channel Proteins 

• Cytoskeleton Filaments

Particles move from a region of lesser concentration to greater concentration by ___.

• facilitated transport

• diffusion

• active transport

• osmosis