Active and passive transport

Front

What is the difference between active and passive transport in cells?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What are the two main types of transport mechanisms in cells?

Back

Active transport and passive transport.

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 without using energy.

Front

What is endocytosis?

Back

Endocytosis is an active transport process where cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is an active transport process where cells expel materials by vesicles fusing with the cell membrane.

Front

What role do membrane proteins play in transport?

Back

Membrane proteins facilitate the transport of substances across the cell membrane, either by acting as channels or carriers.

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is an example of active transport that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is concentration gradient?

Back

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