Cellular Transport--IBS

Front

What is cellular transport?

Back

Cellular 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 active transport.

Back

Active transport is the process by which substances move across a cell membrane against their concentration gradient, requiring energy (ATP) to do so.

Front

What is passive transport?

Back

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

Front

What is diffusion?

Back

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

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What does semi-permeable mean?

Back

A semi-permeable membrane allows certain substances to pass through while blocking others, enabling selective transport.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink due to the higher concentration of solutes outside the cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst due to the lower concentration of solutes outside the cell.

Front

What is the role of proteins in active transport?

Back

Proteins, specifically transport proteins, facilitate the movement of substances across the cell membrane against their concentration gradient during active transport.

Front

What is the significance of concentration gradients in cellular transport?

Back

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