Question

which form of cell transport allows small molecules to move from an aerate higher concentration to lower concentration without energy being required from the cell?

Answer 1

Simple diffusion is the cell transport that allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being required from the cell.

Answer 2

Hey there!!

In general, there are two types of cell transports.

• Passive transport
• Active transport

Passive:

In this type of cell transport, the process does not require energy. There are two types. Simple diffusion and osmosis.

Diffusion is the travel of solutes from a region of higher concentration of solute to a lower concentration of solutes. This takes place with smaller molecules.Diffusion could be further divided as facilitated diffusion. This is the same thing but uses the channel protein. This type uses the protein because, the solutes would be too big to enter the phospholipid-bilayer. Glucose uses the facilitated diffusion.

Osmosis is the travel of water from higher concentration(hypotonic) to a lower concentration(hypertonic).

Active:

This type of transport uses energy to pass through. The molecules travel through the channel protein too but the only difference between active and facilitated diffusion is that active transport uses energy. For example the sodium-potassium pump. Potassium comes in and sodium moves out with the help of ATP(energy)(Adinosine-triphosphate)

Now, looking at the question.

The question states small molecules(not water)

Hence, the answer would be Diffusion.

Hope my answer helps!