NYS Diffusion Lab Review

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until they are evenly distributed.

Front

What is osmosis?

Back

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

Front

What is the role of the cell membrane?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.

Front

What is the purpose of Benedict's solution?

Back

Benedict's solution is used to test for the presence of reducing sugars, such as glucose.

Front

What color indicates a positive test for glucose using Benedict's solution?

Back

A positive test for glucose with Benedict's solution changes the color from blue to yellow/orange/brown.

Front

What is the initial color of starch indicator solution?

Back

The initial color of starch indicator solution is amber.

Front

What color change occurs when starch is present in a solution?

Back

When starch is present, the color of the iodine indicator changes to blue-black.

Front

What is the significance of salt water in diffusion experiments?

Back

Salt water can create a hypertonic environment, affecting the movement of water across cell membranes.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy.