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 the difference between passive transport and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane from an area of high concentration to an area of low concentration.

Front

What role do molecular pumps play in cell transport?

Back

Molecular pumps are proteins that move ions or molecules against their concentration gradient, from low concentration to high concentration, using energy.

Front

How do cells maintain homeostasis?

Back

Cells maintain homeostasis by regulating the movement of substances in and out of the cell, ensuring a stable internal environment.

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 significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of substances during passive transport, as molecules move from areas of high concentration to areas of low concentration.

Front

What is an example of passive transport?

Back

An example of passive transport is simple diffusion, where small nonpolar molecules like oxygen and carbon dioxide move directly through the lipid bilayer.

Front

What is the function of transport proteins?

Back

Transport proteins facilitate the movement of specific substances across the cell membrane, either through facilitated diffusion or active transport.

Front

What is the process of endocytosis?

Back

Endocytosis is a type of active transport where the cell engulfs substances by wrapping them in a portion of the cell membrane, forming a vesicle.