Unit 3, part 3 (Bio)

The cell membrane protects the cell . The cell membrane is described as ​ (a)   meaning it performs its role by allowing only certain materials to pass. The model of the cell membrane is called a ​ (b)   , because it is made of many distinct parts.​ The membrane can also be described as a(n)​ (c)   , because the phospholipids are arranged into 2 separate layers.

• Concentration Gradient
• Hypotonic
• Hypertonic
• Isotonic
• Diffusion
• Osmosis
• Facilitated Diffusion
• selectively permeable
• fluid mosaic
• lipid bilayer

The movement of molecules from areas of high to low concentration is called ​ (a)   . A special type of diffusion when water moves from areas of high water concentration to low concentration is called ​ (b)   .​ If molecules move across a membrane from high to low concentration through a special protein channel it is called​ (c)   .

• Concentration Gradient
• Hypotonic
• Hypertonic
• Isotonic
• selectively permeable
• diffusion
• fluid mosaic
• osmosis
• lipid bilayer
• facilitated diffusion

The passive transport occurs due to a(n)​​ (a)   , meaning the difference between concentrations over 2 different areas. A solution that has more solutes in it than compared to a cell is described as ​ (b)   . A solution that has less solutes in it compared to a cell is called ​ (c)   . A solution that has the same amount of solutes in it compared to a cell is described as ​ (d)   .

• Diffusion
• Osmosis
• Facilitated Diffusion
• selectively permeable
• concentration gradient
• fluid mosaic
• Lipid bilayer
• hypertonic
• hypotonic
• isotonic

Tags

NGSS.MS-LS2-1

Click on the example of a cell that is an Isotonic solution.

Click on the example of a cell that is a hypertonic solution.

Click on the example of a cell that is a hypotonic solution.

Identify the types of transport shown in the image.

a

b

c

Simple Diffusion

Active Transport

Facilitated Diffusion

Human blood is normally a 0.9% salt concentration. Which solution would cause Red Blood cells to decrease in size at the greatest rate?

• 0.9% salt/99.1 % water

• 0% salt/100% water

• 2.0% salt/98% water

• 1.5% salt/98.5% water

Tags

NGSS.HS-PS1-5

In the given scenario what will happen?  An egg is placed in pure water for 48 hours.

• The egg will gain water and swell.
• Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
• The egg will lose water and shrink.

Tags

NGSS.HS-LS1-3

Which diagram best shows the end result of diffusion?

• F
• G
• H
• J

Tags

NGSS.MS-PS1-4