Cell Membrane, Transport, Hypertonic, Hypotonic, Isotonic

Front

What is a cell membrane?

Back

A cell membrane is a biological membrane that separates and protects the interior of all cells from the outside environment. It is selectively permeable, allowing certain substances to pass while blocking others.

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, leading to the movement of water out of cells, causing them to shrink.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, resulting in water moving into cells, causing them to swell and potentially burst.

Front

Define isotonic solution.

Back

An isotonic solution has an equal concentration of solutes compared to another solution, resulting in no net movement of water into or out of cells.

Front

What is osmosis?

Back

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

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically moving from high to low concentration.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (ATP) to do so.

Front

What happens to plant cells in a hypertonic solution?

Back

In a hypertonic solution, plant cells lose water, causing them to become plasmolyzed and wilt.

Front

What happens to animal cells in a hypotonic solution?

Back

In a hypotonic solution, animal cells gain water, which can lead to swelling and potentially bursting (lysis).

Front

What is the role of the cell membrane in transport?

Back

The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis and allowing for communication with the environment.