Cell Transport

Front

What is an isotonic environment for a cell?

Back

An isotonic environment is one where the concentration of solutes outside the cell is equal to the concentration of solutes inside the cell, resulting in no net movement of water.

Front

What is active transport in cell transport?

Back

Active transport is the movement of materials across a cell membrane against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What are the main components of the cell membrane?

Back

The cell membrane is primarily made of lipids, specifically phospholipids, along with proteins and carbohydrates.

Front

What is passive transport?

Back

Passive transport is the movement of materials across a cell membrane without the use of energy, occurring along the concentration gradient.

Front

What is the difference between active transport 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.

Front

What role do lipids play in the cell membrane?

Back

Lipids, particularly phospholipids, form the bilayer structure of the cell membrane, providing a barrier to most water-soluble substances.

Front

What is diffusion in the context of cell transport?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.

Front

What is 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 the function of transport proteins in the cell membrane?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion and osmosis.