Passive Transport

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

How do water molecules move during osmosis when a cell is placed in a hypertonic solution?

Back

Water molecules move out of the cell, causing the cell to shrink.

Front

What happens to a cell when it is placed in pure water?

Back

The cell will expand as water enters the cell due to osmosis.

Front

Define passive transport.

Back

Passive transport is the movement of particles across a cell membrane from an area of high concentration to an area of low concentration without the use of energy.

Front

Why is passive transport considered 'passive'?

Back

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

Front

What is a semi-permeable membrane?

Back

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

Front

What is the difference between passive transport 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 are some examples of passive transport?

Back

Examples of passive transport include diffusion, osmosis, and facilitated diffusion.

Front

What role do transport proteins play in passive transport?

Back

Transport proteins facilitate the movement of specific molecules across the cell membrane during passive transport.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration.