Movement through Cell Membranes

Question 1

examples of passive organisms

Answer 1

facilitated diffusion,
diffusion,
osmosis

Question 1

examples of active mechanisms

Answer 1

active transport,
endocytosis,
exocytosis

Question 2

what is diffusion

Answer 2

Molecules scatter from a region of high concentration to an area of low concentration,
Concentration Gradient

Question 3

what is facilitated diffusion

Answer 3

-Uses carrier molecules to transport substances in or out of the cell
-Still from a region of high concentration to low concentration
-Ion channels or pores in the cell membrane

Question 4

what is osmosis

Answer 4

Special case of diffusion when it is water molecules moving;
“The greater the concentration of nonpermeable solute particles in a solution, the lower the water concentration of that solution and the greater the osmotic pressure”

Question 5

types of osmosis?

Answer 5

Isotonic
Hypertonic
Hypotonic

Question 6

what type of osmosis has same osmotic pressure as body fluid

Answer 6

isotonic

Question 7

what type of osmosis has a higher osmotic pressure than body fluid (more stuff)

Answer 7

hypertonic

Question 8

what type of osmosis has less osmotic pressure than body fluid (less stuff)

Answer 8

Hypotonic

Question 9

what is active transport/ what does it do?

Answer 9

Moves particles from an area of low concentration to an area of high concentration
ATP energy is required
Sugars, amino acids, sodium, calcium, and hydrogen are all actively transported across cell membranes

Question 10

Endocytosis and Exocytosis

Answer 10

exocytosis-out
endocytosis-in