Biology Lesson: Cell Membranes

The scientific name for the basic structure of a cell membrane is

• Protein sandwich

• Phospholipid monolayer

• Phospholipid bilayer

• Phospholipid trilayer

The heads of a phospholipid molecule

• Are attracted to water, causing them to face outwards

• Are not attracted to water, causing them to face inwards

Which model best represents the fluid-mosaic model of a cell membrane?

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Which type of protein controls what passes through the cell membrane?

• Transport protein

• Marker protein

• Receptor protein

Which type of protein acts as a "name tag" that identifies a cell to other cells?

• Transport protein

• Receptor protein

• Marker protein

Which type of protein allows a cell to detect a specific substance?

• Transport protein

• Receptor protein

• Marker protein

This is the simplest type of cell transport that occurs when molecules move from an area of high concentration to an area of low concentration due to the RANDOM MOTION of molecules.

• Diffusion

• Homeostasis

• Osmosis

• Active transport

This type of cell transport requires energy to "pump" a substance from an area of low concentration to an area of higher concentration.

• Active transport

• Passive transport

• Diffusion

• Osmosis

This type of transport relates to the movement of water across a membrane

• Osmosis

• Active transport

• Endocytosis

• Exocytosis

What process is shown here?

• Active transport

• Diffusion

• Endocytosis

• Exocytosis