Osmosis

Question 1

What is osmosis?

Answer 1

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Question 2

True or False: Osmosis requires energy.

Answer 2

False: Osmosis is a passive process and does not require energy.

Question 3

Fill in the blank: Osmosis occurs in __________ solutions.

Answer 3

aqueous

Question 4

What is a selectively permeable membrane?

Answer 4

A selectively permeable membrane is a barrier that allows certain molecules or ions to pass through while blocking others.

Question 5

Define hypertonic solution.

Answer 5

A hypertonic solution has a higher concentration of solutes compared to another solution.

Question 6

What happens to a cell placed in a hypertonic solution?

Answer 6

The cell will lose water and shrink.

Question 7

Define hypotonic solution.

Answer 7

A hypotonic solution has a lower concentration of solutes compared to another solution.

Question 8

What happens to a cell placed in a hypotonic solution?

Answer 8

The cell will gain water and may swell or burst.

Question 9

What is isotonic solution?

Answer 9

An isotonic solution has the same concentration of solutes as another solution.

Question 10

True or False: Water always moves from a hypertonic to a hypotonic solution.

Answer 10

False: Water moves from hypotonic to hypertonic solutions.

Question 11

What term describes the pressure exerted by water inside a cell?

Answer 11

Turgor pressure.

Question 12

What is the role of aquaporins in osmosis?

Answer 12

Aquaporins are channel proteins that facilitate the rapid transport of water across cell membranes.

Question 13

Multiple Choice: Which of the following best describes osmosis? A) Movement of solutes, B) Movement of water, C) Active transport.

Answer 13

B) Movement of water.

Question 14

What is osmotic pressure?

Answer 14

Osmotic pressure is the pressure required to prevent the flow of water across a semipermeable membrane.

Question 15

True or False: Osmosis can occur without a semipermeable membrane.

Answer 15

False: Osmosis requires a semipermeable membrane.

Question 16

What is the effect of osmosis on plant cells?

Answer 16

Osmosis helps maintain turgor pressure, which keeps plant cells rigid.

Question 17

What occurs during plasmolysis?

Answer 17

Plasmolysis is the process where a plant cell loses water in a hypertonic solution, causing the cell membrane to pull away from the cell wall.

Question 18

Fill in the blank: The movement of water during osmosis continues until __________ is reached.

Answer 18

equilibrium

Question 19

What is the primary driving force of osmosis?

Answer 19

The concentration gradient of solutes.

Question 20

Define osmolarity.

Answer 20

Osmolarity is the measure of solute concentration in a solution, expressed as osmoles of solute per liter of solution.

Question 21

True or False: Osmosis can affect the volume of blood cells.

Answer 21

True: Osmosis can cause blood cells to swell or shrink based on the surrounding solution.

Question 22

What happens to red blood cells in a hypotonic solution?

Answer 22

They will swell and may burst.

Question 23

What happens to red blood cells in a hypertonic solution?

Answer 23

They will shrink and become crenated.

Question 24

Multiple Choice: Which process is the opposite of osmosis? A) Diffusion, B) Active transport, C) Filtration.

Answer 24

A) Diffusion.

Question 25

What is the significance of osmosis in biological systems?

Answer 25

Osmosis is crucial for maintaining cell shape, nutrient absorption, and waste removal.

Question 26

Define osmotic balance.

Answer 26

Osmotic balance refers to the state where the concentration of solutes is equal on both sides of a semipermeable membrane.