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 passive and active transport.

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What is passive transport?

Back

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

Front

What is active transport?

Back

Active transport is the movement of molecules across the cell membrane using energy, usually moving from an area of low concentration to an area of high concentration.

Front

What are phospholipids?

Back

Phospholipids are a type of lipid that make up the majority of the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What role do proteins play in cell transport?

Back

Proteins assist in the transport of molecules across the cell membrane, especially large or charged molecules that cannot pass through the lipid bilayer directly.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of molecules from high to low concentration, while osmosis specifically refers to the movement of water across a semipermeable membrane.

Front

What is a concentration gradient?

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

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What is homeostasis?

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Homeostasis is the process by which cells and organisms maintain a stable internal environment despite changes in external conditions.

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How does the cell membrane maintain homeostasis?

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The cell membrane maintains homeostasis by controlling the movement of substances in and out of the cell, allowing necessary nutrients to enter and waste products to exit.

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.