Transport Across Membrane

Question 1

What does selectively permeable mean

Answer 1

Large molecules such as starch and protein are unable to pass through

Question 2

What does passive transport mean

Answer 2

The molecules always move down a concentration gradient from hight to low concentration

Question 3

Does passive transport require energy

Answer 3

No

Question 4

Name two examples of passive transport

Answer 4

Osmosis and diffusion

Question 5

What is diffusion

Answer 5

Diffusion is the movement of molecules down a concentration gradient from a region of high concentration to a region of low concentration until the concentration becomes equal

Question 6

What is osmosis

Answer 6

Osmosis is the movement of water molecules from an area of high water concentration to a region of lower concentration through a selectively permeable membrane

Question 7

What is active transport

Answer 7

The movement of molecules and ions across the cell membrane from low to high concentration

Question 8

Is active transport against a concentration gradient

Answer 8

Yes

Question 9

Does active transport require energy

Answer 9

Yes this energy is released during respiration