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 osmosis?

Back

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

Front

What happens to cells in an isotonic solution?

Back

In an isotonic solution, the concentration of solutes is the same on both sides of the membrane, resulting in no net movement of water.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic solutions have equal solute concentrations, hypertonic solutions have a higher solute concentration outside the cell, causing water to leave the cell, and hypotonic solutions have a lower solute concentration outside the cell, causing water to enter the cell.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells engulf substances from the outside environment, which is not a type of passive transport.

Front

What is the role of concentration gradients in passive transport?

Back

Concentration gradients drive passive transport, as substances move from areas of higher concentration to areas of lower concentration.

Front

How does oxygen move in relation to concentration gradients?

Back

Oxygen moves from areas of higher concentration (outside the cell) to areas of lower concentration (inside the cell) during 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 membrane.

Front

What are transport proteins?

Back

Transport proteins are proteins that assist in the movement of substances across a cell membrane.