concept 2

Question 1

passive transport

Answer 1

• molecules move from high to low concentration
• does not require energy

Question 2

active transport

Answer 2

• molecules move from low to high concentration
• requires energy

Question 3

hypertonic solution

Answer 3

• low solute concentration and high water concentration IN THE CELL
• high solute concentration and low water concentration OUTSIDE THE CELL

Question 4

hypotonic solution

Answer 4

• high solute concentration and low water concentration IN THE CELL
• low solute concentration and high water concentration OUTSIDE THE CELL

Question 5

isotonic solution

Answer 5

identical water and solute concentration inside and outside of the cell

Question 6

osmosis

Answer 6

diffusion of water molecules across the membrane

Question 7

simple diffusion

Answer 7

the spreading of out molecules across a membrane until equilibrium is reached

Question 8

facilitated diffusion

Answer 8

the spreading out of molecules across a membrane using proteins

Question 9

small nonpolar molecules move through membrane easily

Question 10

feedback loops

Answer 10

the output of a system is used to stabilize or amplify the system’s actions to maintain
homeostasis

Question 11

positive feedback loops

Answer 11

the output of a system intensifies the response (amplifies the response)
ex. throwing up

Question 12

negative feedback loops

Answer 12

the output of a system causes a counter response to stabilize
ex. sweating