Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What is diffusion?

Back

Diffusion is the process by which molecules move 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 across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and occurs along the concentration gradient, while active transport requires energy to move substances against the concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion.

Front

What role do cell membranes play in transport?

Back

Cell membranes are selectively permeable barriers that control the movement of substances in and out of the cell, allowing for the maintenance of homeostasis.

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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 using energy.

Front

What is an example of a substance that moves via diffusion?

Back

An example of a substance that moves via diffusion is oxygen, which diffuses from areas of high concentration in the lungs to low concentration in the bloodstream.

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How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

Front

What is isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.