AP Biology Unit 2.6-2.11 Membrane Transport, Tonicity, Osmoregul

Front

What is osmosis?

Back

The movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

Define hypertonic solution.

Back

A solution that has a higher concentration of solutes compared to another solution, causing water to move out of a cell.

Front

Define hypotonic solution.

Back

A solution that has a lower concentration of solutes compared to another solution, causing water to move into a cell.

Front

What is homeostasis?

Back

The process by which an organism regulates its internal environment to maintain stable, constant conditions.

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 the cell's internal environment.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and may shrivel due to the higher concentration of solutes outside the cell.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and may swell or burst due to the lower concentration of solutes outside the cell.

Front

What is the function of the rough endoplasmic reticulum (ER)?

Back

The rough ER is involved in the synthesis and processing of proteins, as it is studded with ribosomes.

Front

What is the significance of surface area in cells?

Back

Increased surface area allows for more efficient transport of materials in and out of the cell.

Front

What is plasmolysis?

Back

The process in which cells lose water in a hypertonic solution, causing the cell membrane to pull away from the cell wall.