Active and passive transport practice

Front

What is osmosis?

Back

Osmosis is the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What type of transport is diffusion?

Back

Diffusion is a type of passive transport that involves the movement of molecules from an area of higher concentration to an area of lower concentration without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a membrane from an area of lower concentration to an area of higher concentration, requiring energy (ATP).

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across a membrane without using energy.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells take in substances by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the plasma membrane.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What is concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What is the role of transport proteins in facilitated diffusion?

Back

Transport proteins assist in the movement of larger or polar molecules across the cell membrane during facilitated diffusion.