Transport Across The Cell Membran

Question 1

Name 2 molecules which form the cell membrane

Answer 1

Phospholipids and proteins

Question 2

Define selectively permeable

Answer 2

Allow substances that are small enough to pass through but not larger molecules

Question 3

What term describes the difference in concentrations

Answer 3

Concentration gradient

Question 4

What type of energy doesn’t require energy

Answer 4

Passive transport

Question 5

2 types of passive transport

Answer 5

Diffusion and osmosis

Question 6

Define diffusion

Answer 6

The movement of molecules from an area of higher conc. to an area of lower water concentration, down a concentration gradient

Question 7

Define osmosis

Answer 7

The moment of water molecules from an area of high water conc. to an area of low water conc. Through a selectively permeable cell

Question 8

What happens to a plant cell when it’s placed in pure water

Answer 8

Becomes turgid

Question 9

What happens to a plant cell when it’s placed in strong salt solution

Answer 9

Becomes plasmolysed