Understanding Active and Passive Transport

In the canoeing metaphor, which person needs to exert more effort?

• Neither needs effort

• Both need the same effort

• The person going downstream

• The person going upstream

What is passive transport?

• Movement of molecules against the gradient

• Movement of molecules with the gradient without energy

• Movement of molecules with energy

• Movement of molecules in a vacuum

What happens to molecules in a concentration gradient during passive transport?

• They move from high to low concentration

• They move from low to high concentration

• They require energy to move

• They stay in place

What is an electrical gradient?

• A gradient based on molecule size

• A gradient based on charge differences

• A gradient based on temperature

• A gradient based on pressure

What is an electro-chemical gradient?

• A gradient based on magnetic fields

• A combination of concentration and electrical gradients

• A gradient based on sound

• A gradient based on light

What is required for active transport?

• No energy

• Energy to move particles with the gradient

• Energy to move particles against the gradient

• No movement of particles

What is the sodium-potassium pump an example of?

• Osmosis

• Diffusion

• Active transport

• Passive transport

What does the sodium-potassium pump use to function?

• Glucose

• Oxygen

• ATP

• Carbon dioxide

What ions are moved by the sodium-potassium pump?

• Chloride and bicarbonate

• Hydrogen and hydroxide

• Sodium and potassium

• Calcium and magnesium

How does the sodium-potassium pump move sodium ions?

• With the electrical gradient

• Without any gradient

• Against the concentration gradient

• With the concentration gradient