The Cell Membrane and Cell Transport

The part labeled #1 represents the...

• Protein bilayer

• Proteins

• Sugar chains

• Lipid bilayer

The part labeled #3 represents...

• Cholesterol

• Transport protein

• Glycoprotein

• Polar heads

The part labeled #4...

• Helps keep the cell rigid.

• Helps maintain homeostasis.

• Helps keep the membrane fluid (flexible).

• Recognize other molecules or other cells.

Tags

NGSS.MS-LS1-2

The part labeled #2...

• Recognize molecules and other cells.

• Transport molecules like glucose.

• Help keep the membrane fluid (flexible).

• Keep the membrane polar.

What part of the cell membrane is NONPOLAR?

• Cholesterols

• Phospholipid heads

• Proteins

• Phospholipid tails

Why do the phospholipid tails line up the way they do?

• They are polar and trying to get away from the water.

• They are hydrophobic and trying to get away from the water.

• They are polar and want to be in the water.

• They are hydrophilic and want to be in the water.

What does it mean that water is polar?

• It has a mostly positive charge but a small negative charge.

• It can dissolve nonpolar substances.

• It has a slight positive and slight negative charge.

• It has a positive charge only.

Tags

NGSS.MS-PS1-1

Which statement is TRUE?

• Water will dissolve other polar substances.

• The cell membrane is polar.

• Water is nonpolar.

• Water will dissolve other nonpolar substances.

Tags

NGSS.HS-ESS2-5

Movement of molecules from high to low concentration is...

• simple diffusion

• osmosis

• active transport

• facilitated diffusion

Facilitated diffusion requires...

• energy

• transport proteins

• both energy and transport proteins

• small molecules