Biology I Maap

Front

What is active transport?

Back

Active transport is the process by which cells move ions or molecules against their concentration gradient, using energy (usually from ATP) and specific transport proteins.

Front

What is a protein pump?

Back

A protein pump is a type of transport protein that uses energy to move ions or molecules across a cell membrane against their concentration gradient.

Front

What is diffusion?

Back

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

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space or membrane, which drives the movement of particles.

Front

What happens during osmosis?

Back

Osmosis is the diffusion 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 a cell, causing water to move into the cell, potentially leading to swelling or bursting.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of a cell, causing water to move out of the cell, leading to shrinkage.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes compared to the inside of a cell, resulting in no net movement of water.

Front

What role do transport proteins play in cells?

Back

Transport proteins facilitate the movement of ions and molecules across the cell membrane, either passively or actively.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which specific molecules are transported across a cell membrane via protein channels without the use of energy.