Understanding Active Transport Mechanisms

What is the primary energy source used in active transport to move molecules across the cell membrane?

• Glucose

• ATP

• Oxygen

• Carbon dioxide

Which of the following processes involves the cell membrane engulfing material to bring it into the cell?

• Exocytosis

• Endocytosis

• Diffusion

• Osmosis

The sodium-potassium pump is an example of which type of transport?

• Passive transport

• Facilitated diffusion

• Active transport

• Simple diffusion

In the sodium-potassium pump, how many sodium ions are transported out of the cell for every two potassium ions transported in?

• 1

• 2

• 3

• 4

Which of the following is NOT a function of active transport in cells?

• Nutrient uptake

• Waste removal

• Ion balance

• Passive diffusion

How does active transport contribute to maintaining homeostasis in cells?

• By allowing only passive movement of molecules

• By regulating ion concentrations and cellular communication

• By increasing the temperature of the cell

• By preventing any movement of molecules

What role do vesicles play in active transport?

• They facilitate passive diffusion

• They transport large molecules via endocytosis and exocytosis

• They act as ion channels

• They store ATP

Which ion is primarily involved in maintaining the resting potential of a neuron through active transport?

• Calcium

• Sodium

• Potassium

• Chloride

Exocytosis is a process that:

• Brings substances into the cell

• Expels substances from the cell

• Involves passive transport

• Occurs without energy

Which of the following best describes the role of ion channels in active transport?

• They allow ions to passively diffuse across the membrane

• They use ATP to pump ions against their concentration gradient

• They are involved in the synthesis of ATP

• They prevent ions from entering the cell