Unit 4 Test

Front

What is osmosis?

Back

Osmosis is the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What happens to a plant cell in a hypotonic solution?

Back

The cell will swell and become turgid due to the influx of water.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell.

Front

What is an isotonic solution?

Back

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

Front

What is the primary function of cholesterol in the cell membrane?

Back

To stabilize the membrane's fluidity.

Front

What is active transport?

Back

Active transport is the process of moving molecules against their concentration gradient, requiring energy.

Front

Why is active transport important for cells?

Back

It allows cells to maintain concentration gradients necessary for various cellular functions.

Front

What is passive transport?

Back

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

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.