AP Biology Cell Transport

Fill in the blank:

Osmosis is the movement of ________ across a cell membrane from high to low.

• Carbon dioxide

• Starch

• Water

• Oxygen

Answer explanation

Osmosis is the movement of water across a cell membrane from high to low concentration.

What is the process by which water moves through a selectively permeable membrane?

• Diffusion

• Active transport

• Osmosis

• Endocytosis

Answer explanation

Osmosis is the process by which water moves through a selectively permeable membrane. It is a form of passive transport that occurs from an area of lower solute concentration to an area of higher solute concentration.

What is the main driving force behind osmosis?

• Gravity

• Concentration gradient

• Temperature

• Pressure

What would happen if a cell is placed in a hypertonic solution?

• The cell will swell

• The cell will shrink

• The cell will remain the same size

• The cell will divide

Which description best identifies this type of cellular transport?

• Active transport, because energy is being used to move molecules against the concentration gradient

• Facilitated diffusion, because energy is being used to move molecules with the concentration gradient

• Osmosis, because energy is not being used to move molecules with the concentration gradient

• Endocytosis, because energy is not being used to move molecules against the concentration gradient

Match the following vocabulary terms and definitions.

• Isotonic

• Same concentration; the solution and cell have equal concentration of solutes (particles), so water moves equally between the cell and solution.

• Hypotonic

• Low concentration; the solution has less solutes than the cell, causing water to move into the cell and out of the solution.

• Hypertonic

• High concentration; the solution has more solutes than the cell, causing water to move out of the cell and into the solution.

If a cell cannot produce energy, what type of transport can it no longer perform?

• Simple diffusion

• Facilitated Diffusion

• Osmosis

• Passive Transport

• Active Transport

Tags

NGSS.HS-LS2-3

 An animal cell placed in a hypertonic (salty) solution will

• Stay the same

• Shrink- get smaller

• Swell- get bigger

Tags

NGSS.HS-LS1-3

​ (a)   brings glucose into cells.

• Insulin

• Glucagon

• Glycogen

Which of the following correctly describes hydrophobic and hydrophilic regions of the cellular membrane?

• The hydrophobic region is made of phosphates, and the hydrophilic region is made of lipids.

• The hydrophobic region is 'water-loving', and the hydrophilic region is 'water-fearing'.

• The hydrophobic region is polar, and the hydrophilic region is non-polar.

• The hydrophobic region faces inward in the interior of the membrane, the hydrophilic region faces outwards towards the aqueous environment.