Chapter 9 Lesson 2

Question 1

What is simple diffusion?

Answer 1

Molecules move directly over the phospholipid bilayer and do not need assistance

Question 2

What is facilitated diffusion?

Answer 2

Molecules move over the phospholipid bilayer with the help of protiens

Question 3

What is the difference between facilitated and simple diffusion?

Answer 3

Facilitated diffusion needs proteins to be able to move over the phospholipid bilayer while simple diffusion can do it by itself

Question 4

What is osmosis?

Answer 4

The diffusion of water across a semi-permeable membrane to diluate higher solute concentrations

Question 5

What does it mean to be hypertonic?

Answer 5

There is a higher concentration of solute and a lower concentration of water

Question 6

What does it mean to be hypotonic?

Answer 6

There is a higher concentration of water and a lower concentration of solute

Question 7

What does it mean to be isotonic?

Answer 7

There is an equal concentration of solute and water

Question 8

What is active transport?

Answer 8

When cells need to move against the concentration gradient

Question 9

What is endocytosis?

Answer 9

The use of vesicles to remove large molecules from a cell

Question 10

What is exocytosis?

Answer 10

The use of vesicles to add large molecules into a cell