Review: Cells

Front

What is active transport?

Back

Active transport is the process by which molecules move against the concentration gradient, requiring energy (usually in the form of ATP).

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a semipermeable membrane from an area of high concentration to an area of low concentration.

Front

What is ATP?

Back

ATP (adenosine triphosphate) is a chemical that provides energy for all cellular processes.

Front

How do cells transport molecules against the concentration gradient?

Back

Cells use active transport, which requires energy (ATP) to move molecules against the concentration gradient.

Front

What role does the plasma membrane play in cellular homeostasis?

Back

The plasma membrane controls the materials that enter and exit the cell, helping to maintain cellular homeostasis.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, typically down the concentration gradient.

Front

What is diffusion?

Back

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

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move molecules against the concentration gradient, while passive transport does not require energy and moves molecules down the concentration gradient.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane is a barrier that allows certain substances to pass while blocking others, crucial for processes like osmosis.