Membrane Transport

Question 1

Electrical gradient

Answer 1

Ions that move due to a difference in charge

Question 2

Electrochemical gradient

Answer 2

Both concentration and charge effect particular ions

Question 3

Osmosis

Answer 3

Movement of water from high to low areas of water potential through a partially permeable membrane
Through aquaporins

Question 4

Osmolarity

Answer 4

Concentration of osmotically active particles in a solution

Question 5

Tonicity

Answer 5

Effect a solution has on cell volume

Iso, hypo, hypertonic

Question 6

Active transport

Answer 6

Movement against a concentration gradient that requires energy
Primary = energy directly needed to move, NaK pump
Secondary = energy x direct, symport = solute + ion move at the smae time, antiport = solute + ion move in opposite directions

Question 7

Vesicular transport

Answer 7

Endocytosis = pinching of the membrane to engulf a substance

Exocytosis =vesicles fuse with membrane releasing contents into the ECF

Question 8

Ficks law

Answer 8

Factors that influence the rate of net diffusion:
Magnitude of concentration gradient
Surface area
Lipid solubility
Molecular weight
Distance of diffusion pathway