cell membrane 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, maintaining homeostasis.

Front

Define osmosis.

Back

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

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 as water enters.

Front

What is a hypertonic solution?

Back

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

Front

Define isotonic solution.

Back

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What is active transport?

Back

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

Front

What is passive transport?

Back

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

Front

What role do protein channels play in cell membrane transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, allowing for selective permeability.

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region of the cell membrane consists of fatty acid tails of phospholipids, which repel water and create a barrier.

Front

What is diffusion?

Back

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