Lecture 6: Membrane Transport

Question 1

chloride protein channel

Answer 1

facilitates the movement of chloride ions through the cell membrane.

Question 2

simple diffusion

Answer 2

solutes move along their concentration gradient (high to low) directly through the cell membrane until equilibrium is reached.

Question 3

osmosis

Answer 3

water moves from low to high concentration until equilibrium is reached. There must be a concentration difference for water to move; water follows solutes.

Question 4

facilitated diffusion

Answer 4

uses a protein channel to diffuse through the cell membrane along their concentration gradient (high to low); does not require energy; shape change.

Question 5

active transport

Answer 5

move through the cell membrane against their concentration gradient (low to high) through a protein channel, using energy.

Question 6

primary active transport

Answer 6

protein pump moves ions against their concentration gradient using ATP.

Question 7

secondary active transport

Answer 7

transport protein uses the energy released by a solute moving along its concentration and chemical gradient to power other solutes moving against their gradients (in the SAME co-transporter).