Osmosis & Diffusion Flashcard 1

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a semipermeable membrane from an area of high water concentration to an area of low water concentration.

Front

What is diffusion?

Back

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

Front

What regulates what enters and leaves a cell?

Back

The Cell Membrane regulates what enters and leaves a cell.

Front

What is a semipermeable membrane?

Back

A semipermeable membrane is a barrier that allows certain substances to pass through while blocking others, typically allowing water and small molecules to pass.

Front

What happens to water in a hypertonic solution?

Back

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

Front

What happens to water in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing the cell to swell and potentially burst.

Front

What is isotonic solution?

Back

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

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, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What role do proteins play in cell membranes?

Back

Proteins in cell membranes help transport substances across the membrane and can act as receptors for signaling.