Passive Transport: Simple, Facilitated, and Osmosis

Front

What is passive transport?

Back

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

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What is osmosis?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane without energy.

Front

What role does the cell membrane play in passive transport?

Back

The cell membrane controls the movement of substances in and out of the cell, allowing for passive transport of certain molecules.

Front

What is homeostasis?

Back

Homeostasis is the process by which a cell or organism maintains a stable internal environment despite changes in external conditions.

Front

How do oxygen molecules move in passive transport?

Back

Oxygen molecules diffuse from areas of high concentration inside the plant leaf to areas of low concentration in the atmosphere.

Front

What is the difference between passive transport and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during passive transport.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, crucial for maintaining homeostasis.

Front

What is the function of channel proteins in facilitated diffusion?

Back

Channel proteins provide a passageway for specific molecules to cross the cell membrane during facilitated diffusion.