Cell Tonicity and Cell Transport

Front

What is osmosis?

Back

Osmosis is a form of passive transport that involves the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What type of transport is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the need for energy input, relying on concentration gradients.

Front

What happens to a cell in a hypertonic solution?

Back

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

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, leading to water entering the cell and potentially causing it to swell and burst.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

Define diffusion.

Back

Diffusion is the movement of solute particles from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across the cell membrane without energy.

Front

Why can't ocean fish survive in freshwater?

Back

Ocean fish cannot survive in freshwater because freshwater is hypotonic to their cells, causing water to enter the cells and potentially leading to cell bursting.

Front

What is the role of the cell membrane in transport?

Back

The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (ATP) to move molecules from low to high concentration.