LS Cell Membrane Virtual Intro

The picture below is an example of _________________.

• osmosis

• isotonic

• diffusion

• active transport

Draw what will happen to the particles according to diffusion.

Which picture shows diffusion?

• 
• 

Tags

NGSS.MS-LS1-2

Now we are going to think about the cell membrane.

Find the cell membrane on the picture.

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Imagine the ziploc bag is a cell membrane. What is the purpose of a cell membrane?

• To store DNA

• To give energy to the cell

• To be the "skin" of the cell and control how things go in and out of the cell.

• To make the cell divide

Tags

NGSS.MS-LS1-2

If you zoom closer at a cell membrane, it looks like this. What are two things you notice?

Tags

NGSS.MS-LS1-2

Cell membranes are made of a phospholipid bilayer. What does it mean to be a bilayer?

• Everything is random

• Three layers

• Single layer

• Two layers

Tags

NGSS.MS-LS1-2

The cell membrane is made of parts called phospholipids that have a head and two tails.

Draw 10 more phospholipids in the blank space.

Tags

NGSS.MS-LS1-2

Phospholipids are made of two main parts, a circular hydrophilic head and two hydrophobic tails. This keeps them in the right place.

Label phospholipid.

a

b

Hydrophobic Tail

Hydrophilic Head

Tags

NGSS.MS-LS1-2

The sponge is permeable. This means that

• The sponge allows liquids to pass through it.
• The sponge absorbs all liquids completely.
• The sponge repels liquids.
• The sponge is impermeable to liquids.