VCS Biology _Unit 2_Cell Membrane & Transport

Front

What is osmosis?

Back

Osmosis is the process where water molecules move through a selectively permeable membrane from an area of high concentration to an area of low concentration.

Front

What does selectively permeable mean?

Back

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

Front

Why are small cells more efficient at obtaining nutrients?

Back

Small cells have a larger surface area to volume ratio, allowing for more efficient nutrient absorption.

Front

What happens to the water level in a container divided by a membrane permeable to water but not to starch when starch concentrations differ?

Back

The water level on the side with lower starch concentration will increase as water moves to balance the concentration.

Front

What is the main difference between active transport and passive transport?

Back

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

Front

What is diffusion?

Back

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

Front

What occurs when a cell is placed in a hypertonic solution?

Back

Water moves out of the cell, causing it to shrink.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution.