04/06

Open Ended

What is Osmosis

Open Ended

Is osmosis an example of active or passive transport?  Explain using evidence from the model above.

Fill in the Blanks

Dropdown

If a solution is hypotonic, the water concentration is ​

Select answer

outside the cell than inside

Drag and Drop

If I place a cell in a hypertonic solution the cell will​ ​

Placeholder

due to the ​

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water concentration outside the cell

Drag these tiles and drop them in the correct blank above

shrink

low

swell

high

stay the same

neutral

Open Ended

Is the image below illustrating the diffusion of solute or the osmosis of water? Why?

Multiple Choice

If cells with a 20% solute are placed in a strong sugar solution, what will happen?

• Water will pass from the sugar solution to the cells

• Water will pass from the cells to the sugar solution

• Water will stay in the cell

• Sugar will move into the cells.

Multiple Choice

 A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, distilled water, equal to the volume of blood lost, is transferred directly into one of his veins. What will be the most probable result of this transfusion? 

• The patient's red blood cells will shrivel up because the blood fluid is hypotonic compared to the cells.

• The patient's red blood cells will swell because the blood fluid is hypotonic compared to the cells.

• The patient's red blood cells will shrivel up because the blood fluid is hypertonic compared to the cells

• The patient's red blood cells will burst because the blood fluid is hypertonic compared to the cells.

Multiple Choice

A student put together the experimental setup shown. The selectively permeable membrane is permeable to both types of solute molecules shown. 

How would you expect the molecules to change over time in the diagram? 

• Both types of molecules will move to reach equilibrium. 

• All of Molecule D will move to side B. 

• All of Molecule C will move to side B. 

• There will be no change over time. 

Multiple Choice

The cellular process known as the sodium-potassium pump was discovered in the late 1950s by Jens Christian Skou, a Danish scientist.  This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that move into the cell.  Which of these best explains why energy is needed for active transport?

• Ions are negatively charged.

• Ions are attached to large proteins.

• Ions are trapped inside the plasma membrane.

• Ions are moved against the concentration gradient.

Multiple Choice

The diagram shows a type of passive transport where oxygen molecules can move freely through the cell.

Over time, what will happen to the concentration of oxygen molecules on both sides of the membrane?

• Diffusion will move oxygen out of the cell unit and all of the oxygen molecules have moved through the membrane.

• Diffusion will move oxygen into the cell unit until it contains the same number of molecules as outside the cell.

• Osmosis will move oxygen out of the cell until all the oxygen molecules have moved through the membrane.

• Osmosis will move oxygen into the cell unit; it contains the same number of molecules as outside the cell.

Multiple Choice

The diagram represents three sections of a cell membrane showing three different methods involved in the transport of various molecules across the membrane.

Methods A and B are classified as methods of passive transport because they do not require

• ATP

• Carbon dioxide

• A protein

• DNA

Multiple Choice

Which statement below is an accurate reason why the movement of molecules in method C represents active transport?

• Method C represents active transport because the molecules are moving from a high concentration of solutes to a low concentration of solutes, or against the concentration gradient.

• Method C represents active transport because the molecules are moving from a low concentration of solutes to a high concentration of solutes, or against the concentration gradient.

• Method C represents active transport because the molecules are moving from a high concentration of solutes to a low concentration of solutes, or with the concentration gradient.

• Method C represents active transport because the molecules are moving from a low concentration of solutes to a high concentration of solutes, or with the concentration gradient.