Cell membrane transport

Front

What is the general name for movement of substances across cell membranes without need of energy input?

Back

Passive transport

Front

What type of transport requires energy to move substances across cell membranes?

Back

Active transport

Front

What part of a phospholipid is hydrophilic?

Back

The phosphate 'head'

Front

What does hydrophobic mean?

Back

Hates water

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is the role of transport proteins in cell membranes?

Back

They facilitate the movement of substances across the membrane.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy, while passive transport does not.

Front

What is a selectively permeable membrane?

Back

A membrane that allows certain substances to pass while blocking others.

Front

What is the function of cholesterol in the cell membrane?

Back

It helps to maintain membrane fluidity and stability.