Cell Membrane and Cell Transport

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell, leading to cell shrinkage.

Front

What is 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 osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which large or charged molecules cross the cell membrane with the help of transport proteins, without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy (ATP).

Front

How does temperature affect the rate of diffusion?

Back

Higher temperature increases the rate of diffusion because it provides more energy to the molecules, causing them to move faster.

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell, leading to cell swelling.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either by facilitating diffusion or by actively transporting molecules.

Front

What is the cell membrane's structure?

Back

The cell membrane is composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates, providing fluidity and selective permeability.