The cell membrane

Question 1

What does selectively permeable mean?

Answer 1

Controls entry + exit of molecules and only allows certain molecules in

Question 2

What is the cell membrane also known as?

Answer 2

The plasma membrane

Question 3

What does the cell membrane contain?

Answer 3

Proteins and phospholipids

Question 4

What is the cell membrane?

Answer 4

The cell membrane is a fluid bilayer of constantly moving phospholipid molecules containing a patchy network of protein molecules also referred to as the fluid mosaic model

Question 5

What is diffusion?

Answer 5

Diffusion is the movement of molecules of a substance from a region of higher concentration of that substance to a region of lower concentration down a concentration gradient, until the concentration becomes equal. This is a passive process and does not require energy

Question 6

What do the proteins in the plasma membrane do?

Answer 6

Form channels which small molecules can pass through