Cell Transportation

Question 1

simple diffusion

Answer 1

the passive movement of particles from areas of high concentration to low concentration through a selectively permeable membrane

Question 2

what molecules are usually diffused in simple diffusion?

Answer 2

oxygen, carbon dioxide, urea, and ethanol

Question 3

facilitated diffusion

Answer 3

the passive transport of small/non-polar molecules through the integral protein

Question 4

what is required for facilitated diffusion?

Answer 4

a concentration gradient and a channel protein

Question 5

active transport

Answer 5

the use of energy from the hydrolysis of ATP to move ions or large molecules across the cell membrane

Question 6

active transport requires

Answer 6

ATP and movement against a concentration gradient

Question 7

sodium - potassium pump

Answer 7

follows a repeating cycle of pumping 3 sodium ions out of the axon (of neurons) and 2 potassium ions pumped in

Question 8

osmosis

Answer 8

the net movement of water from low solute concentration to high solute concentration through a partially permeable membrane

Question 9

isotonic

Answer 9

an area/solution that is equal in solute concentration

Question 10

hypotonic

Answer 10

an area/solution that has a low solute concentration

Question 11

hypertonic

Answer 11

an area/solution that has a high solute concentration

Question 12

solute

Answer 12

a substance dissolved in another substance

Question 13

cholesterol

Answer 13

makes phospholipids in the bilayer pack more tightly and regulates fluidity and flexibility of the membrane