Exploring Cell Membrane Structure and Function

The video explains the cell membrane's role as a protective layer, its structure made of phospholipids, and its functions in protection, transportation, and communication. It details how the membrane regulates the flow of substances like oxygen and carbon dioxide through diffusion and uses pumps for ions like sodium and potassium. The video concludes with a summary of these key points.

What do a water balloon, castle, turtle, and cell have in common?

• They all can move.

• They all can reproduce.

• They all have a protective outer layer.

• They all have a nucleus.

What is the primary component of the cell membrane?

• Proteins

• Carbohydrates

• Phospholipids

• Cholesterol

What characteristic does the polar head of a phospholipid have?

• It attracts water.

• It repels water.

• It repels lipids.

• It attracts lipids.

Which molecules help keep the cell membrane flexible?

• Only cholesterol

• Proteins, carbohydrates, and cholesterol

• Only carbohydrates

• Only proteins

What is one of the roles of proteins in the cell membrane?

• To provide structural support

• To produce enzymes

• To regulate what flows in and out of the cell

• To store energy

Tags

NGSS.MS-LS1-2

How do smaller objects like oxygen and carbon dioxide move through the cell membrane?

• By active transport

• By osmosis

• By diffusion

• By endocytosis

What is the function of the sodium-potassium pump in the cell membrane?

• To move sodium and potassium in and out of the cell

• To break down waste

• To produce energy

• To store nutrients

Tags

NGSS.MS-LS1-2

Which of the following is NOT a function of the cell membrane?

• Protection

• Communication

• Energy production

• Transportation

Tags

NGSS.MS-LS1-2

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