Cell Transport / Cells Review

Front

What is a phospholipid composed of?

Back

A phospholipid is composed of a phosphate and glycerol head and two fatty acid chain tails.

Front

What does 'selectively permeable' mean?

Back

'Selectively permeable' means that a membrane allows certain substances to pass through while blocking others; it is also known as semipermeable.

Front

What is the process of diffusion?

Back

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

Active transport is the movement of particles from an area of lower concentration to an area of higher concentration, requiring energy.

Front

What is osmosis?

Back

Osmosis is the type of passive transport that focuses on the movement of water through a membrane.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What are the two main types of transport across cell membranes?

Back

The two main types of transport are passive transport and active transport.

Front

What is passive transport?

Back

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

Front

What is an example of passive transport?

Back

An example of passive transport is diffusion or osmosis.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in concentration of a substance between two areas.