Cell Transport

Front

What is the primary function of the cell membrane?

Back

The cell membrane is responsible for maintaining homeostasis by regulating what enters and exits the cell.

Front

Define active transport.

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell takes in large molecules by engulfing them with the cell membrane.

Front

What role do aquaporins play in cells?

Back

Aquaporins are proteins that facilitate the transport of water across the cell membrane.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically from high to low concentration.

Front

List the types of passive transport.

Back

The types of passive transport include simple diffusion, facilitated diffusion, and osmosis.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What distinguishes facilitated diffusion from simple diffusion?

Back

Facilitated diffusion involves the use of transport proteins to help move molecules across the membrane, while simple diffusion does not.

Front

What is the significance of the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, crucial for maintaining cellular function.

Front

Define homeostasis in the context of cell transport.

Back

Homeostasis is the process by which cells maintain a stable internal environment despite changes in external conditions.