Unit 9.2

Question 1

What is diffusion? Does it use energy (ATP)?

Answer 1

movement of molecules from higher concentration to lower concentration - uses no energy

Question 2

What is simple diffusion?

Answer 2

movement of smaller, nonpolar molecules through the cell membrane

Question 3

What is facilitated diffusion?

Answer 3

movement of larger, usually charged molecules across the membrane through the use of specialized proteins

Question 4

What is osmosis? Does it use energy (ATP)?

Answer 4

movement of water from a lower concentration of solutes to a higher concentration of solutes - uses no energy

Question 5

What does hypertonic mean?

Answer 5

higher solute concentration than another solution

Question 6

What does isotonic mean?

Answer 6

the same solute concentration as another solution

Question 7

What does hypotonic mean?

Answer 7

lower solute concentration than another solution

Question 8

What is active transport? Does it use energy (ATP)?

Answer 8

movement of molecules against the concentration gradient (lower concentration to higher concentration) - uses energy

Question 9

What is endocytosis?

Answer 9

the process of substances being moved into a cell by forming a vesicle around them

Question 10

What is exocytosis?

Answer 10

the process of substances being moved out of a cell by forming a vesicle around them