Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

Define osmosis.

Back

Osmosis is the diffusion 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 active transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules pass through the cell membrane via special proteins, moving from an area of high concentration to an area of low concentration without the use of energy.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the need for energy input, typically occurring along the concentration gradient.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins assist in the movement of specific molecules across the cell membrane, particularly during facilitated diffusion and active transport.

Front

Explain the difference between diffusion and osmosis.

Back

Diffusion is the movement of solute particles from an area of high concentration to an area of low concentration, while osmosis specifically refers to the movement of water across a membrane.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is the significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of substances; molecules move from areas of high concentration to low concentration in passive transport.

Front

What is phagocytosis?

Back

Phagocytosis is a type of endocytosis where a cell engulfs large particles or cells, often referred to as 'cell eating'.