Q: Which of the following equations best represents the direction of water movement during osmosis?

$$\text{Water moves from: Low solute concentration} \rightarrow \text{High solute concentration}$$

Question 1

Which of the following best describes the process of diffusion across a cell membrane?

Accepted Answer

Molecules move from areas of high concentration to low concentration without using energy.

Question 2

A hospital patient is accidentally given pure water in an IV instead of an isotonic saline solution. What is the most likely effect on the patient’s red blood cells?

Accepted Answer

The cells will burst due to water entering the cells.

Question 3

Which of the following equations best represents the direction of water movement during osmosis?

Accepted Answer

$$	ext{Water moves from: Low solute concentration} ightarrow 	ext{High solute concentration}$$

Question 4

Which of the following is true about facilitated diffusion?

Accepted Answer

It uses membrane proteins to move molecules down their concentration gradient.

Question 5

A red blood cell is placed in a 1.2 M NaCl solution. What will happen to the cell?

Accepted Answer

It will shrink and crenate.

Question 6

Which process is illustrated when a cell engulfs a large particle by wrapping its membrane around it and forming a vesicle?

Accepted Answer

Endocytosis

Question 7

Why does water rise on the left side of the U-tube in the osmosis model?

Accepted Answer

Water moves toward the side with higher solute concentration.

Question 8

Which of the following best describes the sodium-potassium pump?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell.

Question 9

A cell is placed in a solution and water moves into the cell, causing it to swell. What type of solution is the cell in?

Accepted Answer

Hypotonic

Question 10

Which of the following is an example of active transport?

Accepted Answer

Sodium-potassium pump

Question 11

If a cell is placed in an isotonic solution, what will happen to the cell?

Accepted Answer

It will remain the same size.

Question 12

Which of the following statements about passive transport is correct?

Accepted Answer

It includes diffusion and osmosis.

Question 13

A beaker contains a bag with 0.5 M sucrose solution. The beaker solution is 1.0 M sucrose. What will happen to the bag?

Accepted Answer

Water will move out of the bag, causing it to shrink.

Question 14

Which of the following best explains why pure water is not used in IV bags?

Accepted Answer

Pure water would cause red blood cells to burst due to osmosis.

Question 15

Which of the following is NOT a form of passive transport?

Accepted Answer

Sodium-potassium pump

Question 16

Which process is used by cells to secrete large molecules, such as hormones, out of the cell?

Accepted Answer

Exocytosis

Question 17

A cell is placed in a solution and does not change in size. What can you conclude about the solution?

Accepted Answer

It is isotonic to the cell.

Question 18

Which of the following best describes pinocytosis?

Accepted Answer

The cell engulfs liquid droplets.

Question 19

Which of the following is true about the movement of sodium and potassium ions in the sodium-potassium pump?

Accepted Answer

$$3$$ sodium ions are pumped out and $$2$$ potassium ions are pumped in, using ATP.

Question 20

Which of the following best explains why salt is used to preserve food?

Accepted Answer

Salt creates a hypertonic environment, causing bacteria to lose water and die.

Transport Into and Out of the Cell: Diffusion, Osmosis, and Active Transport

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