Types of Transport

Front

What is active transport?

Back

Active transport is the movement of particles across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane without the use of energy, occurring from a region of higher concentration to a region of lower concentration.

Front

Define osmosis.

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What does hypotonic mean?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing water to move into the cell, potentially leading to swelling.

Front

What does hypertonic mean?

Back

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

Front

What is isotonic?

Back

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

Front

What is the role of ATP in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

Explain the concentration gradient.

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of particles during diffusion.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.