transport of materials across a cell membrane

Question 1

what is simple diffusion

Answer 1

movement of materials from a high concentration to a low concentration until equilibrium is achieved

Question 2

what is facilitated transport

Answer 2

• Proteins in the cell membrane allow molecules to be transported across the membrane
• these proteins are protein channels which form channel proteins and carrier proteins which allow carrier mediated transport.

Question 3

what is vesicular transport

Answer 3

Movement of a substance across the cell membrane in membrane bound sacks called vesicles

Question 4

what is osmosis

Answer 4

movement of water through a differentially permeable membrane from a less concentrated solution to a high concentrated solution

Question 5

what are two functions of the cell membrane

Answer 5

• acts as a physical barrier
• supports cell structure

Question 6

Endocytosis

Answer 6

taking materials into the cell via a vesicle
(phagocytosis- solid)
(pinocytosis - liquid)

Question 7

Exocytosis

Answer 7

materials leaving the cell via a vesicle