Module 11

Question 1

What governs the movement of water across cell membranes?

Answer 1

Osmosis

Cell membranes act as selectively permeable membranes

Question 2

What do cell membranes allow and restrict?

Answer 2

Allow the passage of water but restrict or control the movement of many solutes

This characteristic is crucial for maintaining homeostasis in cells

Question 3

In which direction does water move during osmosis?

Answer 3

From a region of lower solute concentration to a region of higher solute concentration

This movement helps balance solute concentrations on both sides of the membrane

Question 4

What is water potential?

Answer 4

A combination of all factors that influence water movement

It is essential for understanding how water moves in biological systems

Question 5

What is osmotic pressure?

Answer 5

A measure of the tendency for water to move by osmosis across a selectively permeable membrane into a solution with higher solute concentration

Osmotic pressure is a key factor in determining water movement in plants and cells

Question 6

What develops when water moves into a cell by osmosis and the cell wall resists being stretched?

Answer 6

Turgor pressure

Turgor pressure is essential for maintaining cell structure in plants.

Question 7

What is the parameter that combines all factors influencing the movement of water?

Answer 7

Water potential

Water potential includes effects of solutes and pressure.

Question 8

Water moves from areas with _______ water potential to areas with lower water potential.

Answer 8

higher

This movement is analogous to how water flows downhill.

Question 9

What is osmoregulation?

Answer 9

A form of homeostasis that regulates the water level within cells

Osmoregulation is crucial for maintaining cellular function.

Question 10

Do all animals regulate the water level within their cells?

Answer 10

Yes

This regulation is vital for cellular integrity.

Question 11

What is the regulation of osmotic pressure inside cells or organisms called?

Answer 11

Osmoregulation

Osmoregulation is essential for survival in varying environments.

Question 12

What are osmoconformers?

Answer 12

Organisms that maintain an internal solute concentration similar to that of the environment

Osmoconformers typically live in stable environments.

Question 13

What are osmoregulators?

Answer 13

Organisms that have an internal solute concentration different from that of the environment

Osmoregulators can adapt to a wider range of environments.