Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through passive or active mechanisms.

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What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane using energy, often against a concentration gradient.

Front

What is osmosis?

Back

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

Front

What does semi-permeable mean?

Back

Semi-permeable means that a membrane allows certain substances to pass through while blocking others.

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 substances.

Front

What role do lipid bilayers play in cell membranes?

Back

Lipid bilayers form the basic structure of cell membranes, providing a barrier that separates the interior of the cell from the external environment.

Front

What are hydrophilic and hydrophobic substances?

Back

Hydrophilic substances are attracted to water, while hydrophobic substances repel water.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across the cell membrane.

Front

What is the function of protein channels in cell membranes?

Back

Protein channels facilitate the transport of specific molecules across the cell membrane, allowing for selective permeability.