10BD 7-3: Cell Transport

What is the process called when molecules move from an area of higher concentration to an area of lower concentration without the use of energy?

• Active Transport

• Passive Transport

• Endocytosis

• Exocytosis

Which statement concerning diffusion and active transport is correct?

• Active transport requires cell energy while diffusion does not.

• Both diffusion and active transport require cell energy.

• Diffusion requires cell energy while active transport does not.

• Neither diffusion nor active transport requires cell energy.

Which of the following is an example of active transport in cells?

• Diffusion of oxygen

• Osmosis of water

• Sodium-potassium pump

• Facilitated diffusion

Which cell process is shown in the diagram?

• passive transport

• endocytosis

• exocytosis

• glycolysis

Explain how osmosis affects a cell placed in a hypotonic solution.

• The cell will shrink as water leaves the cell.

• The cell will swell as water enters the cell.

• The cell will remain the same size as water moves in and out equally.

• The cell will burst immediately.

Tags

NGSS.HS-LS1-3

The diagram shows a container divided into two compartments by a semi-permeable membrane with circles representing salt. Two solutions containing different concentrations of dissolved salt were placed on each side of the membrane. Which describes what will happen to the water level during the process of osmosis?

• The water level of the left side of the membrane will increase.

• The water level on both sides of the membrane will decrease.

• The water level on both sides of the membrane will stay the same.

• The water level on the right side of the membrane will increase.

Describe the process of endocytosis and provide an example of a substance that might be taken into a cell this way.

• Endocytosis is the process of expelling materials from the cell; an example is the release of hormones.

• Endocytosis is the process of taking materials into the cell; an example is the uptake of nutrients.

• Endocytosis is the process of water moving across a membrane; an example is osmosis.

• Endocytosis is the process of molecules moving down their concentration gradient; an example is diffusion.

Tags

NGSS.HS-LS2-3

The diagram indicates the movement of oxygen molecules through the cell membrane. The circles represent oxygen molecules (O₂) inside and outside the cell. The diagram to the left indicates before time has lapsed and the diagram to the right indicates after time has lapsed. Which process does the diagram represent?

• active transport

• diffusion

• facilitated diffusion

• osmosis

A cell is placed in an isotonic solution. Predict what will happen to the cell and explain why.

• The cell will shrink because water will leave the cell.

• The cell will swell because water will enter the cell.

• The cell will remain the same size because water moves in and out at equal rates.

• The cell will burst because of excessive water intake.

Normally, in the process of osmosis, the net flow of water molecules into or out of the cell, depends upon differences in the ____.

• concentration of proteins on the plasma membrane

• concentration of water molecules inside and outside the cell

• rate of molecular motion on either side of the cell membrane

• rate of movement of insoluble molecules inside the cell