7. Membrane Transport

Question 1

Channel Protein

Answer 1

Opens up a hole to help molecules cross the membrane

Question 2

Transporter-mediated transport

Answer 2

Includes both passive and active

Uses a transporter protein

Question 3

Passive transport

Answer 3

Involves protein
No energy input
Down C gradient

Question 4

Active transport

Answer 4

Protein
Energy input (typically ATP)
Against C gradient

Question 5

electrochemical gradient across a cell membrane

Answer 5

Typically negative inside

Question 6

Ion diffusion across membrane

Answer 6

Cation relatively easy

Anion relatively difficult

Question 7

Coupled Transporter

Answer 7

Uses one solute’s concentration gradient as the energy source to transport another solute

Question 8

ATP-Driven Pump

Answer 8

Uses ATP hydrolysis to transport a solute

Question 9

Light-Driven Pump

Answer 9

Uses photon energy as a source for transport

Question 10

Uniport

Answer 10

One molecule is transported

Question 11

Symport

Answer 11

Two molecules move in the same direction

Question 12

Antiport

Answer 12

Molecules move the opposite direction

Question 13

Glucose transport into Cell

Answer 13

1. Occluded-Empty
2. Outward open, sodium and glucose binds
3. Occluded-occupied
4. Inward-open

Repeat

Question 14

Glucose intake in intestine

Answer 14

Symport - Glucose and Na+
Glucose diffuses out into extracellular fluid
Na-K pump transports Na inside

Question 15

P type pump

Answer 15

Ions out of cell

Question 16

ABC pump

Answer 16

Variety of molecules, flipase

Question 17

V type pump

Answer 17

Protons across membrane

Question 18

F type ATP Synthase

Answer 18

Same as V type just operates opposite