Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane forms a boundary that separates the cellular contents from the outside environment, controls the movement of molecules in and out of the cell, and is capable of receiving and recognizing chemical signals.

Front

What is active transport?

Back

Active transport is the process by which molecules move from an area of low concentration to an area of high concentration, using energy.

Front

What is passive transport?

Back

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

Front

Define diffusion.

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

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 does selectively permeable mean?

Back

Selectively permeable refers to a property of cell membranes that allows certain molecules to pass through while blocking others.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transporting substances, acting as channels or carriers, and play a role in cell signaling.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a mosaic of various proteins that float in or on the fluid lipid bilayer, allowing for flexibility and movement.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.