1.4 membrane transport

Question 1

what are the types of movement?

Answer 1

passive (no ATP)
active (ATP)

Question 2

what is simple diffsion?

Answer 2

molecules can move freely throughout the membrane
only occurs with nonpolar molecules
rate can be affected by temp and concentration gradient.

Question 3

what is facilitated diffusion?

Answer 3

passive
molecules get assistance from integral protein channels
heps larger polar molecules move across the cell membrane

Question 4

what is osmosis?

Answer 4

passive movement only for water
how water moves from a high to a low concentration
allowed because the membrane is partially permeable
if there is too many molecules the aquaporin will be used.

Question 5

what is a solute?

Answer 5

any substance dissolved in water

Question 6

what is a solvent?

Answer 6

a substance that dissolves a solute resulting in a solution

Question 7

what is a hypertonic solution?

Answer 7

a high concentration outside the cell

Question 8

what is a hypotonic solution?

Answer 8

solution outside the cell has a low amount of solute.

Question 9

what is an isotonic solution?

Answer 9

there is an equal amount of solute

Question 10

what is active transport?

Answer 10

particles are moved against the concentration gradient

Question 11

what is endocytosis and exocytosis?

Answer 11

bulk transport
ATP is required
the membrane creates a grove that folds into itself trapping a large amount of solution