Cell Transport

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell engulfs material from its environment, bringing it into the cell by forming a vesicle.

Front

Why is passive transport called 'passive'?

Back

Passive transport is called 'passive' because it occurs without the use of energy.

Front

What happens to an animal cell in a hypertonic solution?

Back

An animal cell placed in a hypertonic solution will shrink due to the loss of water.

Front

Define osmosis.

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What occurs when a cell is placed in a hypotonic solution?

Back

When a cell is placed in a hypotonic solution, it will swell as water enters the cell.

Front

What is the role of the Na/K pump?

Back

The Na/K pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell, using energy.

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.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses carrier proteins to help move substances across the cell membrane.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others.