Transport

Question 1

passive trasnport
no energy required
transports CO2, O2, onpolar molecules
moves down concentration gradient (high to low gradient)

Answer 1

diffusion

Question 2

passive transport
no energy req
transports H20
moves down gradient
moves from hypotonic to hypertonic
special form of diffusion

Answer 2

osmosis

Question 3

higher concentration of solutes outside the cell than inside the cell
water moves out of the cell and into the solution

Answer 3

hypertonic solution

Question 4

higher concentration of solute inside the cell than outside

water moves into the cell

Answer 4

hypotonic solution

Question 5

equal concentration of solute inside and outside the cell

water moves across the membrane at an equal rate in both directions to maintain equilibrium and cell size

Answer 5

isotonic solution

Question 6

passive transport
no energy req
transports polar molecules and ions which cannot easily cross nonpolar bilayer
moves down gradient
requires carrier molecules (i.e. transport proteins)

Answer 6

facilitated diffusion

Question 7

actively transports substances
requires energy
movs from low to high gradient (up concentration gradient)
Ex: transport proteins, Na+, K+ pump

Answer 7

active transport

Question 8

type of active transport
req energy through rearrangement of cytoskeleton to form vesicles
transports substanes too big for transport proteins (i.e. leukocytes engulfing a bacterium)
moves up or down conc gradient
ex: pinocytosis, i.e. “cell drinking” is this on a smaller scale

Answer 8

endocytosis (phagocytosis)

Question 9

type of active transport
req energy
transports substances too big for transport proteins
large volume of molecules (i.e. neurotransmitters or enzyme secretion)
moves up or down conc gradient

Answer 9

exocytosis