Cell Membrane/Cell Transport/Tonicity Unit Review

What is the name of this structure that makes up most of the cell membrane?

• Imbedded Transport Protein

• Phospholipid

• Cell Wall

• Hydrophobic

Select all that are true about this structure.

• Hydrophobic Tails

• Hydrophilic Head

• Forms a bilayer with others that share this structure

• Is a type of lipid

Which process is being demonsterated in the image?

• Exocytosis

• Endocytosis

• Diffusion

• Facilitated Diffusion

Which type of cellular transport is being modeled in the image?

• Diffusion

• Facilitated Diffusion

• Osmosis

• Protein Pump

Which of the following can pass through the cell membrane using simple diffusion?

• Oxygen (O2)

• Carbon Dioxide (CO2)

• Starch

• Large Proteins

Which of following statments correctly describes the process of facilitated diffusion?

• Small, charged molecules and ions move down their concentration gradient through proteins imbedded into the cell membrane.

• Solutes move across the membrane against their concetration gradient without the use of a specialized membrane protein.

• Solutes move across the membrane down their concentration gradient through specialized membrane proteins.

• Membrane proteins use energy to move solutes across the membrane against their concentration gradient.

Which term is used to describe the movement of water across a semipermeable membrane from an area of high concentration to an area of low concentration?

• Osmosis

• Protein Pump

• Pinocytosis

• Exocytosis

Which process is being demonstrated in the image?

• Endocytosis

• Exocytosis

• Diffusion

• Osmosis

The following image is a model of how a proton pump moves protons across the membrane. Based on this information, which type of transport best describes how a proton pump works?

• Facilitated Diffusion

• Diffusion

• Active Transport

• Passive Transport

Diffusion can only occur across a semipermeable membrane.

• True

• False