Cell Transport

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 LIPID BILAYER?

• 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

• Diffusion of water through a selectively permeable membrane

• 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

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

• Phosphate hydrophilic heads

• Lipid hydrophobic tails

• Lipid bilayer

• protein

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

• Lipid hydrophobic tails

• Protein

• Lipid bi layer

• Phosphate hydrophilic heads

Which answer correctly describes the lipid bilayer?

• lipids are hydrophobic; phosphates are hydrophobic

• lipids are hydrophilic; phosphates are hydrophilic

• lipids are hydrophobic; phosphates are hydrophilic

• lipids are hydrophilic; phosphates are hydrophobic

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