Question 1

Which of the following best describes osmosis across a semi-permeable membrane?

Accepted Answer

Movement of water molecules from low to high solute concentration.

Question 2

A red blood cell is placed in a solution with a lower solute concentration than its cytoplasm. What will happen to the cell?

Accepted Answer

It will swell and possibly burst due to water influx.

Question 3

Which equation correctly represents the calculation of osmotic pressure ($\Pi$) using van't Hoff's law?

Accepted Answer

$\Pi = iCRT$

Question 4

A solution is described as hypertonic relative to the cell. What does this mean?

Accepted Answer

The solution has a higher solute concentration than the cell.

Question 5

Which of the following is a non-penetrating solute commonly found in extracellular fluid?

Accepted Answer

Sodium chloride (NaCl)

Question 6

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

Accepted Answer

It will remain the same.

Question 7

Which of the following best defines tonicity?

Accepted Answer

The ability of a solution to change the shape of a cell by altering its water content.

Question 8

A patient receives an intravenous solution that is hypotonic to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

Cells will swell and may lyse due to water influx.

Question 9

Which of the following pairs of solutions would be considered isotonic to each other?

Accepted Answer

0.9% NaCl and 0.9% NaCl

Question 10

If a cell is placed in a solution with a solute concentration of 15%, and the cell's cytoplasm has a solute concentration of 10%, what type of solution is this relative to the cell?

Accepted Answer

Hypertonic

Question 11

Which of the following statements about osmosis is correct?

Accepted Answer

Osmosis is the movement of water across a semi-permeable membrane.

Question 12

A cell is placed in a solution containing non-penetrating solutes. Which factor determines the direction of water movement?

Accepted Answer

The concentration of non-penetrating solutes inside and outside the cell.

Question 13

Which of the following is NOT a consequence of placing a cell in a hypertonic solution?

Accepted Answer

Cell swelling due to water influx.

Question 14

Which of the following best describes the effect of tonicity on animal cells?

Accepted Answer

Tonicity determines whether cells gain, lose, or maintain water volume.

Question 15

Which of the following is a correct definition of a hypotonic solution relative to the cell?

Accepted Answer

A solution with a lower solute concentration than the cell.

Question 16

A cell is placed in a solution containing 5% NaCl. The cytoplasm contains 10% NaCl. What will happen to the cell?

Accepted Answer

It will swell.

Question 17

Which of the following is a real-world example of osmosis affecting human health?

Accepted Answer

Dehydration causing cells to shrink in hypertonic conditions.

Question 18

Which of the following is most likely to occur if intravenous fluids are not isotonic to blood plasma?

Accepted Answer

Red blood cells may swell or shrink, leading to hemolysis or crenation.

Question 19

Which of the following best explains why non-penetrating solutes are important in determining tonicity?

Accepted Answer

They cannot cross the cell membrane, so they influence water movement.

Question 20

A cell is placed in a solution with the same concentration of non-penetrating solutes as its cytoplasm. What type of solution is this?

Accepted Answer

Isotonic

Passive Transport and Osmosis: Lab Pre-Study Guide

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