TedEd Membranes

What is the primary component of the plasma membrane?

• Proteins

• Carbohydrates

• Cholesterol

• Phospholipid

What is the function of cholesterol in the cell membrane?

• Regulate communication between cells

• Anchor the membrane to the cell's interior scaffolding

• Create channels for specific molecules

• Maintain the right fluidity of the membrane

How do cells capture proteins from the external environment?

• Endocytosis

• Exocytosis

Which type of molecules can easily cross the phospholipid bilayer? (Get past the non-polar tails)

• Polar molecules

• Charged molecules

• Non-polar molecules

• Large molecules

What is the role of transmembrane proteins in the cell membrane?

• Anchor the membrane to the cell's interior scaffolding

• Regulate communication between cells

• Create channels for specific molecules

• Fuse two different bilayers

Where are peripheral proteins located in the cell membrane?

• In the cytoplasm

• In the watery fluid external to the cell

• In the phospholipid bilayer

• In the inner face of the bilayer

What would happen without a cell membrane?

• no matter

• no molecules

• no atoms

• no cells

What is the consistency of the bilayer at body temperature?

• Solid, like a balloon

• Gel-like

• Viscous

• Vegetable oil-like

What is the role of cell membranes in communication between cells?

• Release and capture chemicals and proteins

• Anchor the membrane to the cell's interior scaffolding

• Create channels for specific molecules

• Fuse two different bilayers

What is the thickness of the cell membrane?

• Hundreds of times thinner than a strand of spider silk

• As thick as a strand of spider silk

• Thicker than a strand of human hair

• Thinner than a strand of human hair