Cell Membrane and Transport

What molecule plays and important role in controlling cell membrane fluidity? 

• Insulin
• Testosterone
• Triglyceride
• Cholesterol 

Which of the following types of transport requires energy?

• Passive
• Active

Which of the following factors does NOT determine the speed of diffusion? 

• Temperature
• Diameter
• pH
• Concentration Gradients 

Osmosis is the movement of __________ across a membrane? 

• Glucose
• Water
• N⁺ ions
• Hydrogen Peroxide

The cell that is pictured here in is what type of solution?

• Hypertonic
• Isotonic
• Hypotonic
• None of these

_________ proteins are integral membrane proteins that form channels across the membrane through which some substances can pass. 

• Anchored
• Gated
• Embeded
• Channel 

Aquaporins are examples of ____ proteins?

• Channel protein

• Carrier protein

• None of the above

• All of the above

Facilitated diffusion requires ATP.

• True

• False

A process that facilitates movement of molecules along the concentration gradient without utilizing energy.

• Active Transport

• Passive Transport

The movement of water molecules through a semi permeable membrane from an area of high water concentration to an area of lower water concentration.

• Osmosis

• Active transport

• Co-transport

• Counter-transport