9/18 Cell membrane structure and transport

Multiple Choice

Phospholipids are made up of two parts. Which of the following correctly describes these two parts?

• hydrophobic head, hydrophilic tail

• hydrophobic head, hydrophobic tail

• hydrophilic head, hydrophobic tail

• hydrophilic head, hydrophilic tail

Multiple Choice

Which part of the phospholipid is the hydrophobic portion (repels water)?

• Glycerol

• Fatty acids

• Water

• Glycogen

Multiple Select

The cell membrane (two answers):

• Many protein channels.

• Is the outermost layer that mostly protects and supports the cell.

• Is a phospholipid bilayer

• Doesn't let water in.

Multiple Choice

_____________ allows some things to enter and leave cells, while keeping other things out of the cell.

• Nucleus control center of the cell

• Selectively Permeable golgi apparatus

• A selectively permeable membrane

• Non Permeable membrane

Multiple Choice

Which of the following describes the 4 parts of the cell membrane?

• phospholipid bilayer, transport proteins, carbohydrates, and cholesterol

• phospholipid bilayer, transport proteins, carbohydrates, and cell wall

• phospholipid bilayer, starch, carbohydrates, and cholesterol

• cellulose, transport proteins, carbohydrates, and cholesterol

Multiple Choice

In the diagram, what is letter G?

• Phospholipid

• Phospholipid bilayer

• Cholesterol

• Carbohydrate

• Carrier or transport protein

Multiple Choice

In passive transport, molecules move from an area of __________ concentration to an area of __________ concentraiton

• high, low

• low, high

• water, salt

• active, passive

Multiple Choice

What type of transport is this?

• Endocytosis

• Facilitated Diffusion

• Active Transport Pump

• Osmosis

Multiple Choice

What is the definition of Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.

• The movement of materials through (or across) the cell membrane

• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.

Multiple Select

These are all examples of active transport (select more than one answer).

• ATP Energy

• Endocytosis

• Exocytosis

• Osmosis

• Facilitated diffusion

Multiple Choice

What type of transport is this?

• Diffusion

• Osmosis

• Facilitated Diffusion

• Active Transport

Match

Match the following:

• stabilizes and maintains flexibility of cell membrane

• 2 layers; allows small & non-polar molecules to pass through the membrane

• regulates what goes in and out of the cell

• allows large and polar molecules to pass through the membrane

• located outside of the membrane; helps with cell communication and cell-to-cell connections

Cholesterol

Phospholipid bilayer

Plasma or Cell Membrane

Transport or Channel Proteins

Carbohydrates

• Cholesterol

• Phospholipid bilayer

• Plasma or Cell Membrane

• Transport or Channel Proteins

• Carbohydrates

Multiple Choice

The cell membrane maintains...

• Energy

• Homeostasis/Equilibrium

• The cell looking good

Multiple Choice

What type of transport is this?

• Endocytosis

• Diffusion

• Exocytosis

• Osmosis

Multiple Choice

Define plasma membrane

• lipid that helps minimize effects of temperature

• only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

• flexible boundary of a cell that separates a cell from its surroundings

• may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

Multiple Choice

In order for active transport to happen.........

• a transport protein is needed

• a transport protein is needed, oxygen is needed and carbon dioxide is needed

• a transport protein is needed PLUS energy (ATP) is needed

• no energy is needed

Multiple Choice

Which type of biological macromolecule is the main component of the cell (plasma) membrane?

• carbohydrate

• lipid

• protein

• nucleic acid

Multiple Choice

A phospholipid has 2 parts. What are they called? 

• Hydrophilic Head, Hydrophobic Tail 

• Hydrophobic Head, Hydrophilic Tail 

Multiple Choice

Molecules moving from high to low concentration.

• Passive Transport

• Active Transport

Multiple Choice

Solutes (salt/sugar) move against the concentration gradient

• Passive Transport

• Active Transport

Multiple Choice

Which image correctly shows the way phospholipids arrange themselves in the cell (plasma) membrane?

Multiple Choice

What is diffusion?

• when molecules move 

• when molecules

  (particles) move from a high concentration to a low.

• no movement 

• molecules move everywhere