Cell Transport

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 involves the movement of molecules down their concentration gradient without energy?

Back

Facilitated diffusion.

Front

What happens to an animal cell in fresh water?

Back

The cell will burst because water moves into the cell due to osmotic pressure.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy.

Front

What occurs when an egg is placed in pure water?

Back

The egg will gain water and swell.

Front

Define diffusion.

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane via protein channels without energy.

Front

What is the role of a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass while blocking others, maintaining homeostasis.

Front

Explain the concept of osmotic pressure.

Back

Osmotic pressure is the pressure required to prevent the flow of water across a semipermeable membrane due to solute concentration differences.

Front

What happens during osmosis in a hypertonic solution?

Back

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