Exploring Transport Mechanisms in Cell Membranes

What should you understand before learning about transport across a cell membrane?

• The structure of DNA

• The parts of the cell membrane

• The process of photosynthesis

• The function of ribosomes

What is the main characteristic of passive transport?

• It requires energy

• It moves molecules against their gradient

• It involves random movement of particles

• It uses ATP

Which type of diffusion specifically involves the movement of water?

• Simple diffusion

• Facilitated diffusion

• Osmosis

• Active transport

What happens to a red blood cell in a hypertonic solution?

• It swells and bursts

• It remains unchanged

• It shrivels up

• It divides

What is required for facilitated diffusion to occur?

• ATP

• Proteins

• Cholesterol

• Lipids

What is the role of the glucose transport protein in facilitated diffusion?

• It breaks down glucose

• It changes the shape of glucose

• It produces ATP

• It helps glucose move across the membrane

What is the main function of the sodium-potassium pump?

• To move sodium outside the cell and potassium inside

• To move sodium inside the cell and potassium outside

• To facilitate osmosis

• To produce glucose

How many ATP molecules are required to move three sodium ions and two potassium ions using the sodium-potassium pump?

• Two

• Four

• One

• Three

What is endocytosis?

• The process of moving materials out of the cell

• The process of moving materials into the cell

• The process of producing ATP

• The process of cell division

What is the role of neurotransmitters in exocytosis?

• They facilitate osmosis

• They produce ATP

• They move across the synapse to transmit signals

• They break down glucose