Transport Proteins

Which type of substances can dissolve in the biological membrane?

• Lipid insoluble substances

• Lipid soluble substances

• Na and K ions

• Glucose

What are the three main types of transport proteins?

• Pumps, channels, and carriers

• Lipids, ions, and glucose

• Na, K, and ATP

• Oxygen, carbon dioxide, and glucose

Which type of transport protein moves substances uphill against their electrochemical gradient?

• Pumps

• Channels

• Carriers

• Ligand-gated channels

What is the energy source used by pumps for primary active transport?

• ATP

• Oxygen

• Glucose

• Carbon dioxide

Which type of transport protein provides continuous passage through the membrane?

• Pumps

• Channels

• Carriers

• Gated channels

What is the main characteristic of pores in channels?

• They are always open

• They are selective for a particular type of ion

• They are controlled by ligands

• They are controlled by voltage

What controls the opening or closing of ligand-gated channels?

• Voltage

• ATP

• Ligands

• Glucose

Which type of transport protein moves molecules in opposite directions?

• Pumps

• Channels

• Carriers

• Antiporters

What is the name of the cotransporter in the apical membrane of the proximal tubule?

• Na-K-ATPase pump

• Na/Glucose cotransporter

• Na/Ca exchanger

• Na/K/Cl cotransporter

Which type of transport protein moves a single type of substance down its electrochemical gradient?

• Uniporters

• Symporters

• Antiporters

• Pumps