Lecture 17-18: Membrane transport proteins

Question 1

describe passive transport

Answer 1

no energy needed

solute travels down concentration gradient

Question 2

describe active transport

Answer 2

coupled to ATP hydrolysis

solute travels against concentration gradient

Question 3

what are the three modes of transport

Answer 3

antiporter
symporter
uniporter

Question 4

what are the three categories of transporters

Answer 4

pumps
carriers
channels

Question 5

describe pump transporters

Answer 5

perform primary active transport

Question 6

describe carrier transporters

Answer 6

traverse the membrane without needing extra energy

Question 7

describe channel transporters

Answer 7

used in passive transport

Question 8

What are the factors that affect diffusion rates

Answer 8

1. magnitude of the concentration gradient
2. size of the molecule
3. surface area:volume ratio
4. temperature
5. density of the solvent
6. solubility of solute
7. distance to destination