Cell Membrane and Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and structural support.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a cell membrane through protein channels, moving from an area of high concentration to low concentration without energy.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell will lose water and shrink due to the higher concentration of solutes outside the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing the cell to swell and potentially burst.

Front

Explain active transport.

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP) to move substances from low to high concentration.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving the movement of particles from high to low concentration.

Front

What is the role of protein channels in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, allowing substances that cannot pass freely to enter or exit the cell.

Front

Define 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 occurs during simple diffusion?

Back

Simple diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration without the need for energy or assistance.