Homeostasis Unit Review #2 (Cells & Cycles)

Front

The cell shrunk in size, which means it was placed in a ____ solution.

Back

Hypertonic solution: A solution with a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell.

Front

This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

Back

Cell membrane: A biological membrane that separates and protects the interior of all cells from the outside environment.

Front

This image demonstrates that there is a direct correlation with the atmospheric CO₂ and the CO₂ in seawater.

Back

Direct correlation: A relationship where an increase in one variable results in an increase in another variable.

Front

Osmosis is the movement of _____ across a membrane.

Back

Water: The process by which water molecules move from an area of lower solute concentration to an area of higher solute concentration through a semipermeable membrane.

Front

As the ocean becomes more acidic, the pH of the water _____.

Back

Decreases: A lower pH indicates higher acidity in the water.

Front

Define homeostasis.

Back

Homeostasis: The ability of an organism to maintain a stable internal environment despite changes in external conditions.

Front

What is the role of the cell membrane in homeostasis?

Back

The cell membrane regulates the movement of substances in and out of the cell, helping to maintain a stable internal environment.

Front

What is a hypotonic solution?

Back

Hypotonic solution: A solution with a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell.

Front

Explain the process of diffusion.

Back

Diffusion: The movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What happens to a cell in a hypertonic solution?

Back

The cell loses water and shrinks due to the higher concentration of solutes outside the cell.