NYS Diffusion State Regents Lab Flashcard

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What does it mean for a cell membrane to be selectively permeable?

Back

A selectively permeable cell membrane allows certain substances to enter or exit the cell while restricting others.

Front

What is the primary difference between diffusion and active transport?

Back

Diffusion is a passive process that does not require energy, while active transport requires energy to move substances against their concentration gradient.

Front

What observation would indicate that starch has diffused out of a dialysis tube?

Back

The contents of the dialysis tube would turn blue-black when iodine is present, indicating the presence of starch.

Front

What is the role of glucose in plant cells?

Back

Glucose is produced during photosynthesis and serves as an energy source for cellular processes.

Front

How do molecules enter and exit a cell?

Back

Molecules can enter and exit a cell through processes such as diffusion, osmosis, and active transport.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What happens to a cell in a hypertonic solution?

Back

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

Front

What happens to a cell in a hypotonic solution?

Back

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

Front

What is equilibrium in the context of diffusion?

Back

Equilibrium is the state reached when the concentration of molecules is equal on both sides of a membrane, resulting in no net movement.