Cell Transport Quiz

What is the definition of OSMOSIS?

• Diffusion of water through a selectively permeable membrane

• Molecular structure that surrounds the cell and controls what enters and leaves the cell

• Movement of molecules across the cell membrane against the concentration gradient

• Movement of molecules across the cell membrane from an area of high concentration to low concentration

What is the definition of ACTIVE TRANSPORT?

• Movement of molecules across the cell membrane against the concentration gradient

• Diffusion of water through a selectively permeable membrane

• Molecular structure that surrounds the cell and controls what enters and leaves the cell

• Movement of molecules across the cell membrane from an area of high concentration to low concentration

Identify the following structure

• Phospholipid

• Cell

• Cell membrane

• Protein

What is the name of 'A' found on the structure below

• Lipid Bilayer (cell membrane)

• Protein

• Phosphate hydrophilic heads

• Lipid hydrophobic tails

What is the name of 'B' found on the structure below

• Protein

• Lipic bilayer

• Phosphate hydrophilic heads

• Lipid hydrophobic heads

Why would the cell need energy to move molecules across the membrane?

• the molecule is going against the concentration gradient

• the molecule is to large to pass through the membrane

• the lipid membrane requires energy anytime something is moving across the membrane

In passive diffusion, substances always move...

• from an area of higher concentration to an area of lower concentration

• from an area with more of the molecules to an area with fewer of the molecules

• from an area of lower concentration to an area of higher concentration

• from an area with fewer of the molecules to an area with more of the molecules

What is the definition of FACILITATED DIFFUSION?

• Movement of molecules across the cell membrane from an area of high concentration to low concentration

• Diffusion of water through a selectively permeable membrane

• Movement of molecules across the cell membrane against the concentration gradient

• Molecular structure that surrounds the cell and controls what enters and leaves the cell

The following cells have been placed in different solutions.

Make a prediction of what will happen.

(check all that are correct)

• Isotonic-- the cell will maintain size

• hypotonic-- the cell will increase in size

• hypertonic-- the cell will decrease in size

Movement of particles from high to low concentration. 

• Passive Transport
• Active Transport