Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy.

Front

Why is passive transport called 'passive'?

Back

It is called 'passive' because it occurs without the expenditure of energy.

Front

What is simple diffusion?

Back

Simple diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration without the assistance of proteins.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a membrane via specific transmembrane integral proteins.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins assist in the transport of substances across a cell membrane by changing shape.