Exploring Cell Membrane Functions

What is the primary function of the cell membrane in maintaining homeostasis?

• To provide structural support to the cell

• To control what enters and exits the cell

• To store genetic information

• To produce energy for the cell

Tags

NGSS.HS-LS1-3

Which of the following molecules can pass through the cell membrane via simple diffusion?

• Glucose

• Oxygen

• Sodium ions

• Proteins

What is the main difference between simple diffusion and facilitated diffusion?

• Simple diffusion requires energy, while facilitated diffusion does not.

• Facilitated diffusion requires transport proteins, while simple diffusion does not.

• Simple diffusion moves molecules against the concentration gradient, while facilitated diffusion does not.

• Facilitated diffusion occurs only in eukaryotic cells, while simple diffusion occurs in all cells.

Which of the following is an example of active transport?

• Movement of water through aquaporins

• Sodium-potassium pump

• Diffusion of carbon dioxide

• Osmosis

What role do transport proteins play in facilitated diffusion?

• They provide energy for the transport process.

• They act as channels or carriers to help molecules cross the membrane.

• They break down molecules into smaller components.

• They store molecules for later use.

Which process involves the cell membrane fusing with molecules to bring them inside the cell?

• Exocytosis

• Simple diffusion

• Endocytosis

• Facilitated diffusion

What is the primary energy source used in active transport?

• Glucose

• ATP (adenosine triphosphate)

• Oxygen

• Carbon dioxide

Which of the following is a type of endocytosis where cells take in fluids?

• Phagocytosis

• Pinocytosis

• Receptor-mediated endocytosis

• Exocytosis

How does the concentration gradient affect the movement of molecules in passive transport?

• Molecules move from low to high concentration.

• Molecules move from high to low concentration.

• Molecules do not move in passive transport.

• Molecules move randomly without any gradient.

What is the function of aquaporins in the cell membrane?

• To transport glucose molecules

• To facilitate the rapid movement of water across the membrane

• To pump sodium ions out of the cell

• To synthesize ATP

Tags

NGSS.HS-LS1-3